Structural Design-II (RCC) -2

Question No. 1

If longitudinally spanning stairs are casted along with their landings, the maximum bending

moment per metre width, is taken as

(A) wl²/4

(B) wl²/8

(C) wl²/10

(D) wl²/12

Answer: Option B

Question No. 2

If P kg/m2 is the upward pressure on the slab of a plain concrete footing whose projection on

either side of the wall is a cm, the depth of foundation D is given by

(A) D = 0.00775 aP

(B) D = 0.0775 aP

(C) D = 0.07775 aP

(D) D = 0.775 Pa

Answer: Option A

Question No. 3

If the shear stress in a R.C.C. beam is

(A) Equal or less than 5 kg/cm2, no shear reinforcement is provided

(B) Greater than 4 kg/cm2, but less than 20 kg/cm2, shear reinforcement is provided

(C) Greater than 20 kg/cm2, the size of the section is changed

(D) All the above

Answer: Option D

Question No. 4

For a continuous floor slab supported on beams, the ratio of end span length and intermediate

span length, is

(A) 0.6

(B) 0.7

(C) 0.8

(D) 0.9

Answer: Option D

Question No. 5

In a singly reinforced beam

(A) Compression is borne entirely by concrete

(B) Steel possesses initial stresses when embedded in concrete

(C) Plane sections transverse to the centre line of the beam before bending remain plane after

bending

(D) Elastic moduli for concrete and steel have different values within the limits of deformation

of the beam

Answer: Option C

Question No. 6

The ratio of the breadth to effective depth of a beam is kept

(A) 0.25

(B) 0.50

(C) 0.70

(D) 0.75

Answer: Option B

Question No. 7

In a cantilever retaining wall without a heel slab

(A) Thickness of the stem is kept same throughout

(B) Base slab is made 10 cm thicker than the stem

(C) Width of the base slab is kept 0.7 time the total height of the wall

(D) All the above

Answer: Option D

Question No. 8

is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area

of cross section is and sectional modulus is . The maximum stress in the beam, subjected

to a maximum bending moment , is

(A) f = (P/A) + (Z/M)

(B) f = (A/P) + (M/Z)

(C) f = (P/A) + (M/Z)

(D) f = (P/A) + (M/6Z)

Answer: Option C

Question No. 9

A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis

(A) Remains within the flange

(B) Remains below the slab

(C) Coincides the geometrical centre of the beam

(D) None of these

Answer: Option A

Question No. 10

For the design of a simply supported T-beam the ratio of the effective span to the overall depth of

the beam is limited to

(A) 10

(B) 15

(C) 20

(D) 25

Answer: Option C

Question No. 11

A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It

carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete

to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of

shear stirrups required, is

(A) 30

(B) 35

(C) 40

(D) 45

Answer: Option C

Question No. 12

The width of the rib of a T-beam, is generally kept between

(A) 1/7 to 1/3 of rib depth

(B) 1/3 to 1/2 of rib depth

(C) 1/2 to 3/4 of rib depth

(D) 1/3 to 2/3 of rib depth

Answer: Option D

Question No. 13

A ribbed slab is provided for

(A) A plain ceiling

(B) Thermal insulation

(C) Acoustic insulation

(D) All the above

Answer: Option D

Question No. 14

To ensure that the hogging bending moment at two points of suspension of a pile of

length L equals the sagging moment at its centre, the distances of the points of suspension from

either end, is

(A) 0.107 L

(B) 0.207 L

(C) 0.307 L

(D) 0.407 L

Answer: Option B

Question No. 15

The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm

effective depth, are 62.5 kg/cm2 and 250 kg/cm2 respectively. If m = 15, the depth of its neutral

axis is

(A) 20 cm

(B) 25 cm

(C) 30 cm

(D) 35 cm

Answer: Option C

Question No. 16

If the depth of actual neutral axis of a doubly reinforced beam

(A) Is greater than the depth of critical neutral axis, the concrete attains its maximum stress

earlier

(B) Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum

stress earlier

(C) Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum

stresses simultaneously

(D) All the above

Answer: Option D

Question No. 17

If the modular ratio is , steel ratio is and overall depth of a beam is , the depth of the

critical neutral axis of the beam, is

(A) [m/(m - r)] d

(B) [m/(m + r)] d

(C) [(m + r)/m] d

(D) [(r - m)/m] d

Answer: Option B

Question No. 18

The maximum diameter of a bar used in a ribbed slab, is

(A) 12 mm

(B) 6 mm

(C) 20 mm

(D) 22 mm

Answer: Option D

Question No. 19

A column is regarded as long column if the ratio of its effective length and lateral dimension,

exceeds

(A) 10

(B) 15

(C) 20

(D) 25

Answer: Option B

Question No. 20

According to the steel beam theory of doubly reinforced beams

(A) Tension is resisted by tension steel

(B) Compression is resisted by compression steel

(C) Stress in tension steel equals the stress in compression steel

(D) All the above

Answer: Option D

Question No. 21

The breadth of a ribbed slab containing two bars must be between

(A) 6 cm to 7.5 cm

(B) 8 cm to 10 cm

(C) 10 cm to 12 cm

(D) 12 cm to 15 cm

Answer: Option B

Question No. 22

The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of

repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width

of the stem at the bottom, is

(A) 51.5

(B) 52.5

(C) 53.5

(D) 54.5

Answer: Option C

Question No. 23

If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to main bars is

(A) 10 mm

(B) 12 mm

(C) 14 mm

(D) 16 mm

Answer: Option D

Question No. 24

Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less

than

(A) One diameter of thinner bar

(B) One diameter of thicker bar

(C) Twice the diameter of thinner bar

(D) None of these

Answer: Option B

Question No. 25

For a number of columns constructed in a rcjw, the type of foundation provided, is

(A) Footing

(B) Raft

(C) Strap

(D) Strip

Answer: Option D

Question No. 26

A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with

18.75 cm2 steel. If the modular ratio (m) is 15, the depth of the neutral axis, is

(A) 20 cm

(B) 25 cm

(C) 30 cm

(D) 35 cm

Answer: Option C

Question No. 27

In testing a pile by load test, pile platform is loaded with one and half times the design load and a

maximum settlement is noted. The load is gradually removed and the consequent rebound is

measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of

test load should not exceed

(A) 10 mm

(B) 15 mm

(C) 20 mm

(D) 25 mm

Answer: Option D

Question No. 28

The diameter of main bars in R.C.C. columns, shall not be less than

(A) 6 mm

(B) 8 mm

(C) 10 mm

(D) 12 mm

Answer: Option D

Question No. 29

If d is the diameter of a bar, ft is allowable tensile stress and fb, is allowable bond stress, the bond

length is given by

(A) ft .d/4fb

(B) ( /4). (ft .d/fb)

(C) ft .d²/fb

(D) ( /4). (ft .d3/fb)

Answer: Option A

Question No. 30

An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm

incasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining

beams and if the width of the beam is 20 cm, the breadth of the flange is

(A) 300 cm

(B) 233 cm

(C) 176 cm

(D) 236 cm

Answer: Option C

Question No. 31

The length of lap in tension reinforcement should not be less than the bar diameter × (actual

tension / four times the permissible average bond stress) if it is more than

(A) 18 bar diameters

(B) 24 bar diameters

(C) 30 bar diameters

(D) 36 bar diameters

Answer: Option C

Question No. 32

As the percentage of steel increases

(A) Depth of neutral axis decreases

(B) Depth of neutral axis increases

(C) Lever arm increases

(D) Lever arm decreases

Answer: Option B

Question No. 33

The effective width of a column strip of a flat slab, is

(A) One-fourth the width of the panel

(B) Half the width of the panel

(C) Radius of the column

(D) Diameter of the column

Answer: Option B

Question No. 34

As per IS : 1343, total shrinkage for a pre-tensioned beam, is

(A) 3.0 × 10-2

(B) 3.0 × 10-3

(C) 3.0 × 10-5

(D) 3.5 × 10-5

Answer: Option D

Question No. 35

Dimensions of a beam need be changed if the shear stress is more than

(A) 10 kg/cm2

(B) 15 kg/cm2

(C) 20 kg/cm2

(D) 25 kg/cm2

Answer: Option C

Question No. 36

Based on punching shear consideration, the overall depth of a combined footing under a

column A, is

(A) (Area of the column A × Safe punching stress)/Load on column A

(B) (Perimeter of column A × Safe punching stress)/(Load on column A + Upward pressure ×

Area of the column)

(C) (Perimeter of column A × Safe punching stress)/(Load on column A × Upward pressure ×

Area of the column)

(D) None of these

Answer: Option B

Question No. 37

Pick up the correct statement from the following:

(A) A pile is a slender member which transfers the load through its lower end on a strong strata

(B) A pile is a slender member which transfers its load to the surrounding soil

(C) A pile is a slender member which transfers its load by friction

(D) A pile is a cylindrical body of concrete which transfers the load at a depth greater than its

width

Answer: Option B

Question No. 38

In a combined footing if shear stress exceeds 5 kg/cm2, the nominal stirrups provided are:

(A) 6 legged

(B) 8 legged

(C) 10 legged

(D) 12 legged

Answer: Option D

Question No. 39

The weight of reinforced concrete, is generally taken as

(A) 2200 kg/m3

(B) 2300 kg/m3

(C) 2400 kg/m3

(D) 2500 kg/m3

Answer: Option C

Question No. 40

If W is the load on a circular slab of radius R, the maximum circumferential moment at the centre

of the slab, is

(A) WR²/16

(B) 2WR²/16

(C) 3WR²/16

(D) Zero

Answer: Option C

Question No. 41

If is weight of a retaining wall and is the horizontal earth pressure, the factor of safety

against sliding, is

(A) 1.0

(B) 1.25

(C) 1.5

(D) 2.0

Answer: Option C

Question No. 42

The effective span of a simply supported slab, is

(A) Distance between the centres of the bearings

(B) Clear distance between the inner faces of the walls plus twice the thickness of the wall

(C) Clear span plus effective depth of the slab

(D) None of these

Answer: Option B

Question No. 43

In a beam the local bond stress Sb, is equal to

(A) Shear force/(Leaver arm × Total perimeter of reinforcement)

(B) Total perimeter of reinforcement/(Leaver arm × Shear force)

(C) Leaver arm/(Shear force × Total perimeter of reinforcement)

(D) Leaver arm/(Bending moment × Total perimeter of reinforcement)

Answer: Option A

Question No. 44

A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall

depth, is

(A) 2.5

(B) 2.0

(C) Less than 2

(D) Less than 2.5

Answer: Option A

Question No. 45

With usual notations the depth of the neutral axis of a balanced section, is given by

(A) mc/t = (d - n)/n

(B) t/mc = (d - n)/n

(C) t/mc = (d + n)/n

(D) mc/t = n/(d - n)

Answer: Option D

Question No. 46

Pick up the true statement from the following:

(A) Plain ceiling provides the best property diffusing light

(B) In the absence of beams, it is easier to install piping

(C) In the absence of beams, it is easier to paint

(D) All the above

Answer: Option D

Question No. 47

If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is

10 kg/cm2, the length of the beam having nominal reinforcement, is

(A) 8 cm

(B) 6 m

(C) 8 m

(D) 10 m

Answer: Option C

Question No. 48

If the length of a wall on either side of a lintel opening is at least half of its effective span L, the

load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral

triangle, producing a maximum bending moment

(A) WL/2

(B) WL/4

(C) WL/6

(D) WL/8

Answer: Option C

Question No. 49

The section of a reinforced beam where most distant concrete fibre in compression and tension in

steel attains permissible stresses simultaneously, is called

(A) Balanced section

(B) Economic section

(C) Critical section

(D) All the above

Answer: Option D

Question No. 50

The length of the lap in a compression member is kept greater than bar diameter x (Permissible

stress in bar / Five times the bond stress) or

(A) 12 bar diameters

(B) 18 bar diameters

(C) 24 bar diameters

(D) 30 bar diameters

Answer: Option C

Question No. 51

The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing

tendons, is known as

(A) Freyssinet system

(B) Magnel-Blaton system

(C) C.C.L. standard system

(D) Lee-McCall system

Answer: Option D

Question No. 52

An under-reinforced section means

(A) Steel is provided at the underside only

(B) Steel provided is insufficient

(C) Steel provided on one face only

(D) Steel will yield first

Answer: Option D

Question No. 53

The angle of repose of a soil is the maximum angle which the outer face of the soil mass makes

(A) With the horizontal

(B) With the vertical

(C) With the perpendicular to the inclined plane of the soil

(D) None of these

Answer: Option A

Question No. 54

In a doubly-reinforced beam if and is

the effective depth and is depth of critical neutral axis, the following relationship holds good

(A) mc/t = n/(d - n)

(B) (m + c)/t = n/(d + n)

(C) (t + c)/n = (d + n)/n

(D) mc/t = (d - n)/t

Answer: Option A

Question No. 55

A raft foundation is provided if its area exceeds the plan area of the building by

(A) 10 %

(B) 20 %

(C) 40 %

(D) 50 %

Answer: Option D

Question No. 56

In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing

strength

(A) 100 kg/cm2

(B) 200 kg/cm2

(C) 300 kg/cm2

(D) 400 kg/cm2

Answer: Option D

Question No. 57

If p1 is the vertical intensity of pressure at a depth h on a block of earth weighing w per unit

p2 is

(A) wh (1 - cos )/(1 + )

(B) wh (1 - sin )/(1 + )

(C) wh (1 - tan )/(1 + )

(D) w (1 - cos )/h (1 + sin )

Answer: Option B

Question No. 58

Pick up the incorrect statement from the following. The intensity of horizontal shear stress at the

elemental part of a beam section, is directly proportional to

(A) Shear force

(B) Area of the section

(C) Distance of the C.G. of the area from its neutral axis

(D) Moment of the beam section about its neutral axis

Answer: Option D

Question No. 59

According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is

kept less than

(A) 20 cm

(B) 30 cm

(C) 40 cm

(D) 75 cm

Answer: Option B

Question No. 60

An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 metres and carries

a U.D.L. of 3000 kg/m inclusive of its self weight. If the lever arm constant for the section is 0.865,

the maximum intensity of shear stress, is

(A) 8.3 kg/cm2

(B) 7.6 kg/cm2

(C) 21.5 kg/cm2

(D) 11.4 kg/cm2

Answer: Option A

Question No. 61

The percentage of minimum reinforcement of the gross sectional area in slabs, is

(A) 0.10 %

(B) 0.12 %

(C) 0.15 %

(D) 0.18 %

Answer: Option C

Question No. 62

If the permissible compressive stress for a concrete in bending is C kg/m2, the modular ratio is

(A) 2800/C

(B) 2300/2C

(C) 2800/3C

(D) 2800/C2

Answer: Option C

Question No. 63

An R.C.C. beam not provided with shear reinforcement may develop cracks in its bottom inclined

roughly to the horizontal at

(A) 25°

(B) 35°

(C) 45°

(D) 55°

Answer: Option C

Question No. 64

Cantilever retaining walls can safely be used for a height not more than

(A) 3 m

(B) 4 m

(C) 5 m

(D) 6 m

Answer: Option D

Question No. 65

The maximum area of tension reinforcement in beams shall not exceed

(A) 0.15 %

(B) 1.5 %

(C) 4 %

(D) 1 %

Answer: Option C

Question No. 66

The width of the flange of a T-beam should be less than

(A) One-third of the effective span of the T-beam

(B) Distance between the centres of T-beam

(C) Breadth of the rib plus twelve times the thickness of the slab

(D) Least of the above

Answer: Option D

Question No. 67

For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to

maximum positive radial moment, is

(A) 1

(B) 2

(C) 3

(D) 5

Answer: Option B

Question No. 68

According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is

(A) 5 kg/cm2

(B) 10 kg/cm2

(C) 15 kg/cm2

(D) 20 kg/cm2

Answer: Option A

Question No. 69

The width of the flange of a T-beam, which may be considered to act effectively with the rib

depends upon

(A) Breadth of the rib

(B) Overall thickness of the rib

(C) Centre to centre distance between T-beams

(D) All the above

Answer: Option D

Question No. 70

The maximum shear stress (qmax) in a rectangular beam is

(A) 1.25 times the average

(B) 1.50 times the average

(C) 1.75 times the average

(D) 2.0 times the average

Answer: Option B

Question No. 71

If the sides of a slab simply supported on edges and spanning in two directions are equal, the

maximum bending moment is multiplied by

(A) 0.2

(B) 0.3

(C) 0.4

(D) 0.5

Answer: Option D

Question No. 72

If K is a constant depending upon the ratio of the width of the slab to its effective span l, x is the

distance of the concentrated load from the nearer support, bw is the width of the area of contact

of the concentrated load measured parallel to the supported edge, the effective width of the

slab be is

(A) K/x (1 + x/d) + bw

(B) Kx (1 - x/l) + bw

(C) Kx (1 + x/l) + bw

(D) All the above

Answer: Option B

Question No. 73

The length of the straight portion of a bar beyond the end of the hook, should be at least

(A) Twice the diameter

(B) Thrice the diameter

(C) Four times the diameter

(D) Seven times the diameter

Answer: Option D

Question No. 74

If the maximum bending moment of a simply supported slab is M Kg.cm, the effective depth of the

slab is (where Q is M.R. factor)

(A) M/100Q

(B) M/ Q

(C) M/Q)

(D) (M/100Q)

Answer: Option D

Question No. 75

If is the overall height of a retaining wall retaining a surcharge, the width of the base slab

usually provided, is

(A) 0.3 H

(B) 0.4 H

(C) 0.5 H

(D) 0.7 H

Answer: Option D

Question No. 76

If Sb, is the average bond stress on a bar of diameter subjected to maximum stress , the

length of the embedment is given by

(A) l = dt/Sb

(B) l = dt/2Sb

(C) l = dt/3Sb

(D) l = dt/4Sb

Answer: Option D

Question No. 77

If diameter of a reinforcement bar is d, the anchorage value of the hook is

(A) 4d

(B) 8d

(C) 12d

(D) 16d

Answer: Option D

Question No. 78

As per I.S. 456 - 1978, the pH value of water shall be

(A) Less than 6

(B) Equal to 6

(C) Not less than 6

(D) Equal to 7

Answer: Option C

Question No. 79

For M 150 mix concrete, according to I.S. specifications, local bond stress, is

(A) 5 kg/cm2

(B) 10 kg/cm2

(C) 15 kg/cm2

(D) 20 kg/cm2

Answer: Option B

Question No. 80

The minimum cube strength of concrete used for a pre-stressed member, is

(A) 50 kg/cm2

(B) 150 kg/cm2

(C) 250 kg/cm2

(D) 350 kg/cm2

Answer: Option D

Question No. 81

If d and n are the effective depth and depth of the neutral axis respectively of a singly reinforced

beam, the lever arm of the beam, is

(A) d

(B) n

(C) d + n/3

(D) d - n/3

Answer: Option D

Question No. 82

The weight of a foundation is assumed as

(A) 5% of wall weight

(B) 7% of wall weight

(C) 10% of wall weight

(D) 12% of wall weight

Answer: Option C

Question No. 83

An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm placed symmetrically along

the circumference. If it carries a load of 40, 000 kg axially, the stress is

(A) 49.9 kg/cm2

(B) 100 kg/cm2

(C) 250 kg/cm2

(D) 175 kg/cm2

Answer: Option A

Question No. 84

If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties

should not be less than

(A) 4 mm

(B) 5 mm

(C) 6 mm

(D) 8 mm

Answer: Option B

Question No. 85

Design of R.C.C. cantilever beams, is based on the resultant force at

(A) Fixed end

(B) Free end

(C) Mid span

(D) Mid span and fixed support

Answer: Option A

Question No. 86

In a combined footing if shear stress does not exceed 5 kg/cm2, the nominal stirrups provided are

(A) 6 legged

(B) 8 legged

(C) 10 legged

(D) 12 legged

Answer: Option B

Question No. 87

The maximum shear stress (q) in concrete of a reinforced cement concrete beam is

(A) Shear force/(Lever arm × Width)

(B) Lever arm/(Shear force × Width)

(C) Width/(Lever arm × Shear force)

(D) (Shear force × Width)/Lever arm

Answer: Option A

Question No. 88

An R.C.C. column is treated as long if its slenderness ratio is greater than

(A) 30

(B) 35

(C) 40

(D) 50

Answer: Option D

Question No. 89

The thickness of base slab of a retaining wall generally provided, is

(A) One half of the width of the stem at the bottom

(B) One-third of the width of the stem at the bottom

(C) One fourth of the width of the steam at the bottom

(D) Width of the stem at the bottom

Answer: Option D

Question No. 90

Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at

(A) Supports

(B) Mid span

(C) Every section

(D) Quarter span

Answer: Option B

Question No. 91

If the maximum shear stress at the end of a simply supported R.C.C. beam of 6 m effective span is

10 kg/cm2, the share stirrups are provided for a distance from either end where, is

(A) 50 cm

(B) 100 cm

(C) 150 cm

(D) 200 cm

Answer: Option C

Question No. 92

Distribution reinforcement in a simply supported slab, is provided to distribute

(A) Load

(B) Temperature stress

(C) Shrinkage stress

(D) All the above

Answer: Option D

Question No. 93

Distribution of shear intensity over a rectangular section of a beam, follows:

(A) A circular curve

(B) A straight line

(C) A parabolic curve

(D) An elliptical curve

Answer: Option C

Question No. 94

In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel,

the beam section is called

(A) Under-reinforced section

(B) Over reinforced section

(C) Economic section

(D) Critical section

Answer: Option B

Question No. 95

If the size of a column is reduced above the floor, the main bars of the columns, are

(A) Continued up

(B) Bent inward at the floor level

(C) Stopped just below the floor level and separate lap bars provided

(D) All the above

Answer: Option D

Question No. 96

The minimum number of main steel bars provided in R.C.C.

(A) Rectangular columns is 4

(B) Circular columns is 6

(C) Octagonal columns is 8

(D) All the above

Answer: Option D

Question No. 97

A short column 20 cm × 20 cm in section is reinforced with 4 bars whose area of cross section is 20

sq. cm. If permissible compressive stresses in concrete and steel are 40 kg/cm2 and 300 kg/cm2,

the Safe load on the column, should not exceed

(A) 4120 kg

(B) 41,200 kg

(C) 412,000 kg

(D) None of these

Answer: Option B

Question No. 98

If T and R are tread and rise respectively of a stair, then

(A) 2R + T = 60

(B) R + 2T = 60

(C) 2R + T = 30

(D) R + 2T = 30

Answer: Option A

Question No. 99

For stairs spanning l metres longitudinally between supports at the bottom and top of a flight

carrying a load w per unit horizontal area, the maximum bending moment per metre width, is

(A) wl²/4

(B) wl²/8

(C) wl²/12

(D) wl²/16

Answer: Option D

Question No. 100

In a singly reinforced beam, the effective depth is measured from its compression edge to

(A) Tensile edge

(B) Tensile reinforcement

(C) Neutral axis of the beam

(D) Longitudinal central axis

Answer: Option B

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Structural Design-II (RCC) -1

Question No. 01

An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t

per m and allowable shear stress is 5 kg/cm2, the beam

(A) Is safe in shear

(B) Is safe with stirrups

(C) Is safe with stirrups and inclined bars

(D) Needs revision of section

Answer: Option D

Question No. 02

According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to

be divided in each direction into middle strips and edge strips such that the width of the middle

strip, is

(A) Half of the width of the slab

(B) Two-third of the width of the slab

(C) Three-fourth of the width of the slab

(D) Four-fifth of the width of the slab

Answer: Option C

Question No. 03

The load stress of a section can be reduced by

(A) Decreasing the lever arm

(B) Increasing the total perimeter of bars

(C) Replacing larger bars by greater number of small bars

(D) Replacing smaller bars by greater number of greater bars

Answer: Option C

Question No. 04

The diameter of the column head support a flat slab, is generally kept

(A) 0.25 times the span length

(B) 0.25 times the diameter of the column

(C) 4.0 cm larger than the diameter of the column

(D) 5.0 cm larger than the diameter of the column

Answer: Option A

Question No. 05

If is the uniformly distributed load on a circular slab of radius fixed at its ends, the

maximum positive radial moment at its centre, is

(A) 3WR²/16

(B) 2WR²/16

(C) WR²/16

(D) None of these

Answer: Option C

Question No. 06

The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is

(A) 35

(B) 25

(C) 30

(D) 20

Answer: Option C

Question No. 07

If the width of the foundation for two equal columns is restricted, the shape of the footing

generally adopted, is

(A) Square

(B) Rectangular

(C) Trapezoidal

(D) Triangular

Answer: Option B

Question No. 08

The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end

and intermediate spans is kept

(A) 0.7

(B) 0.8

(C) 0.9

(D) 0.6

Answer: Option C

Question No. 09

Pick up the correct statement from the following:

(A) Lateral reinforcement in R.C.C. columns is provided to prevent the longitudinal

reinforcement from buckling

(B) Lateral reinforcement prevents the shearing of concrete on diagonal plane

(C) Lateral reinforcement stops breaking away of concrete cover, due to buckling

(D) All the above

Answer: Option D

Question No. 10

In case the factor of safety against sliding is less than 1.5, a portion of slab is constructed

downwards at the end of the heel slab, which is known as

(A) A key

(B) A cut-off wall

(C) A rib

(D) All the above

Answer: Option D

Question No. 11

Lapped splices in tensile reinforcement are generally not used for bars of size larger than

(A) 18 mm diameter

(B) 24 mm diameter

(C) 30 mm diameter

(D) 36 mm diameter

Answer: Option D

Question No. 12

Minimum spacing between horizontal parallel reinforcement of the same size should not be less

than

(A) One diameter

(B) 2.5 diameters

(C) 3 diameters

(D) 3.5 diameters

Answer: Option A

Question No. 13

For a ribbed slab

(A) Clear spacing between ribs shall not be greater than 4.5 cm

(B) Width of the rib shall not be less than 7.5 cm

(C) Overall depth of the slab shall not exceed four times the breadth of the rib

(D) All the above

Answer: Option D

Question No. 14

A very comfortable type of stairs is

(A) Straight

(B) Dog legged

(C) Geometrical

(D) Open newel

Answer: Option D

Question No. 15

Columns may be made of plain concrete if their unsupported lengths do not exceed their least

lateral dimension

(A) Two times

(B) Three times

(C) Four times

(D) Five times

Answer: Option C

Question No. 16

The width of the flange of a L-beam, should be less than

(A) One-sixth of the effective span

(B) Breadth of the rib + four times thickness of the slab

(C) Breadth of the rib + half clear distance between ribs

(D) Least of the above

Answer: Option D

Question No. 17

A pre-stressed concrete member is preferred because

(A) Its dimensions are not decided from the diagonal tensile stress

(B) Large size of long beams carrying large shear force need not be adopted

(C) Removal of cracks in the members due to shrinkage

(D) All the above

Answer: Option D

Question No. 18

If the ratio of the span to the overall depth does not exceed 10, the stiffness of the beam will

ordinarily be satisfactory in case of a

(A) Simply supported beam

(B) Continuous beam

(C) Cantilever beam

(D) None of these

Answer: Option C

Question No. 19

A pile of length carrying a uniformly distributed load per metre length is suspended at two

points, the maximum, B.M. at the centre of the pile or at the points of suspension, is

(A) WL/8

(B) WL²/24

(C) WL²/47

(D) WL²/16

Answer: Option C

Question No. 20

If is the net upward pressure on a square footing of side for a square column of side , the

maximum bending moment is given by

(A) B.M = pb (c - a)/4

(B) B.M = pb (b - a)²/4

(C) B.M = pb (b - a)²/8

(D) B.M = pb (b + a)/8

Answer: Option C

Question No. 21

To ensure uniform pressure distribution, the thickness of the foundation, is

(A) Kept uniform throughout

(B) Increased gradually towards the edge

(C) Decreased gradually towards the edge

(D) Kept zero at the edge

Answer: Option C

Question No. 22

longitudinal bars and lateral stirrups, is

(A) Stress in concrete × area of concrete

(B) Stress in steel × area of steel

(C) Stress in concrete × area of concrete + Stress in steel × area of steel

(D) None of these

Answer: Option C

Question No. 23

If p1 and p2 are mutually perpendicular principal stresses acting on a soil mass, the normal stress

to the principal plane carrying the principal stress p1, is:

(A) [(p - p p p sin 2

(B) [(p - p p p cos 2

(C) [(p p p - p cos 2

(D) [(p p p - p /2] sin 2

Answer: Option C

Question No. 24

The maximum permissible size of aggregates to be used in casting the ribs of a slab, is

(A) 5 mm

(B) 7.5 mm

(C) 10 mm

(D) 15 mm

Answer: Option C

Question No. 25

Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular

beam

(A) Are curtailed if not required to resist the bending moment

(B) Are bent up at suitable places to serve as shear reinforcement

(C) Are bent down at suitable places to serve as shear reinforcement

(D) Are maintained at bottom to provide at least local bond stress

Answer: Option C

Question No. 26

Steel bars are generally connected together to get greater length than the standard length by

providing

(A) Straight bar splice

(B) Hooked splice

(C) Dowel splice

(D) All the above

Answer: Option D

Question No. 27

The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice

the diameter of the bar subject to a minimum of

(A) 10 mm

(B) 15 mm

(C) 20 mm

(D) 25 mm

Answer: Option D

Question No. 28

Top bars are extended to the projecting parts of the combined footing of two columns Ldistance

apart for a distance of

(A) 0.1 L from the outer edge of column

(B) 0.1 L from the centre edge of column

(C) Half the distance of projection

(D) One-fourth the distance of projection

Answer: Option B

Question No. 29

For M 150 grade concrete (1:2:4) the moment of resistance factor is

(A) 0.87

(B) 8.50

(C) 7.50

(D) 5.80

Answer: Option B

Question No. 30

is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of

cross section is and sectional modulus is . The minimum stress on the beam subjected to a

maximum bending moment is

(A) f = (P/A) - (Z/M)

(B) f = (A/P) - (M/Z)

(C) f = (P/A) - (M/Z)

(D) f = (P/A) - (M/6Z)

Answer: Option C

Question No. 31

If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus

of steel and e is shrinkage strain, the combined effect of creep and shrinkage is:

(A) (1 - C)mf - eE

(B) (C - 1)mf + eE

(C) (C - 1)mf - eE

(D) (1 - C)mf + eE

Answer: Option B

Question No. 32

In a pre-stressed member it is advisable to use

(A) Low strength concrete only

(B) High strength concrete only

(C) Low strength concrete but high tensile steel

(D) High strength concrete and high tensile steel

Answer: Option D

Question No. 33

An R.C.C. lintel is spanning an opening of 2 m span in a brick wall. The height of the roof is 2.9 m

above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be

designed for self weight plus

(A) Triangular load of the wall

(B) UDL of wall

(C) UDL of wall + load from the roof

(D) Triangular load + load from the roof

Answer: Option C

Question No. 34

The minimum clear cover for R.C.C. columns shall be

(A) Greater of 40 mm or diameter

(B) Smaller of 40 mm or diameter

(C) Greater of 25 mm or diameter

(D) Smaller of 25 mm or diameter

Answer: Option C

Question No. 35

The minimum thickness of a flat slab is taken

(A) L/32 for end panels without drops

(B) L/36 for end panels without drops

(C) L/36 for interior panels without drop

(D) All the above

Answer: Option D

Question No. 36

The design of heel slab of a retaining wall is based on the maximum bending moment due to:

(A) Its own weight

(B) Weight of the soil above it

(C) Load of the surcharge, if any

(D) All the above

Answer: Option D

Question No. 37

An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000 kg/m

inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is

(A) Safe in shear

(B) Is safe with stirrups

(C) Is safe with stirrups and inclined members

(D) Needs revision of the section

Answer: Option A

Question No. 38

The neutral axis of a T-beam exists

(A) Within the flange

(B) At the bottom edge of the slab

(C) Below the slab

(D) All the above

Answer: Option D

Question No. 39

A pre-cast pile generally used, is

(A) Circular

(B) Square

(C) Octagonal

(D) Square with corners chamfered

Answer: Option D

Question No. 40

The spacing of transverse reinforcement of column is decided by the following consideration.

(A) The least lateral dimension of the column

(B) Sixteen times the diameter of the smallest longitudinal reinforcing rods in the column

(C) Forty-eight times the diameter of transverse reinforcement

(D) All the above

Answer: Option D

Question No. 41

The self-weight of the footing, is

(A) Not considered for calculating the upward pressure on footing

(B) Also considered for calculating the upward pressure on footing

(C) Not considered for calculating the area of the footing

(D) Both (b) and (c)

Answer: Option A

Question No. 42

Pick up the incorrect statement from the following:

(A) In the stem of a retaining wall, reinforcement is provided near the earth side

(B) In the toe slab of a retaining wall, reinforcement is provided at the bottom of the slab

(C) In the heel slab of a retaining wall, reinforcement is provided at the top of the slab

(D) None of these

Answer: Option D

Question No. 43

If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from

walls, is a cm, the depth D of footing is

(A) D = 0.0775 a

(B) D = 0.775 a

(C) D = 0.775 a

(D) D = 0.775 a2

Answer: Option B

Question No. 44

After pre-stressing process is completed, a loss of stress is due to

(A) Shrinkage of concrete

(B) Elastic shortening of concrete

(C) Creep of concrete

(D) All the above

Answer: Option D

Question No. 45

In a simply supported slab, alternate bars are curtailed at

(A) 1/4th of the span

(B) 1/5th of the span

(C) 1/6th of the span

(D) 1/7th of the span

Answer: Option D

Question No. 46

If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on

one side and by a stringer beam on the other side, the steps are designed as beams of width

(A) R + T

(B) T - R

(C) 2 + T2)

(D) R - T

Answer: Option C

Question No. 47

If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected

to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per

unit length of the wall, is

(A) [( - )/2] h

(B) [( + )/4] h

(C) [( + )/2] h

(D) ( - h

Answer: Option C

Question No. 48

In the zone of R.C.C. beam where shear stress is less than 5 kg/cm2, nominal reinforcement is

provided at a pitch of

(A) One-half lever arm of the section

(B) One-third lever arm of the section

(C) Lever arm of the section

(D) One and half lever arm of the section

Answer: Option C

Question No. 49

The transverse reinforcements provided at right angles to the main reinforcement

(A) Distribute the load

(B) Resist the temperature stresses

(C) Resist the shrinkage stress

(D) All the above

Answer: Option D

Question No. 50

Long and short spans of a two way slab are ly and lx and load on the slab acting on strips parallel

to lx and ly be wx and wy respectively. According to Rankine Grashoff theory

(A) (wx/wy) = (ly/lx)

(B) (wx/wy) = (ly/lx)²

(C) (wx/wy) = (ly/lx)4

(D) None of these

Answer: Option C

Question No. 51

The pitch of the main bars in a simply supported slab, should not exceed its effective depth by

(A) Three times

(B) Four times

(C) Five times

(D) Six times

Answer: Option D

Question No. 52

High strength concrete is used in pre-stressed member

(A) To overcome high bearing stresses developed at the ends

(B) To overcome bursting stresses at the ends

(C) To provide high bond stresses

(D) All the above

Answer: Option D

Question No. 53

If is the load on a circular slab of radius , the maximum radial moment at the centre of the

slab, is

(A) WR²/16

(B) 2WR²/16

(C) 3WR²/16

(D) 5WR²/16

Answer: Option C

Question No. 54

If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of

weight w per unit volume, the minimum depth (h) of the foundation from the free surface of the

earth, is

(A) h = (W/Aw) [(1 - )/(1 + sin )]

(B) h = (W/Aw) [(1 + )/(1 + sin )]

(C) h = (W/Aw) [(1 - )/(1 + sin )]²

(D) h W/Aw) [(1 - )/(1 + sin )]²

Answer: Option C

Question No. 55

If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm2 and

1400 kg/cm2 respectively and the modular ratio is 18, the percentage area At of the steel required

for an economic section, is

(A) 0.496 %

(B) 0.596 %

(C) 0.696 %

(D) 0.796 %

Answer: Option C

Question No. 56

The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained

from the equation.

(A) m = 700/3C

(B) m = 1400/3C

(C) m = 2800/3C

(D) m = 3500/3C

Answer: Option C

Question No. 57

Enlarged head of a supporting column of a flat slab is technically known as

(A) Supporting end of the column

(B) Top of the column

(C) Capital

(D) Drop panel

Answer: Option C

Question No. 58

Thickened part of a flat slab over its supporting column, is technically known as

(A) Drop panel

(B) Capital

(C) Column head

(D) None of these

Answer: Option A

Question No. 59

If is the sectional area of a pre-stressed rectangular beam provided with a tendon pre-stressed

by a force through its centroidal longitudinal axis, the compressive stress in concrete, is

(A) P/A

(B) A/P

(C) P/2A

(D) 2A/P

Answer: Option A

Question No. 60

Side face reinforcement shall be provided in the beam when depth of the web in a beam exceeds

(A) 50 cm

(B) 75 cm

(C) 100 cm

(D) 120 cm

Answer: Option B

Question No. 61

A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is

provided with a bent tendon with tension P such that central one-third portion of the tendon

remains parallel to the longitudinal axis, the maximum dip h is

(A) WL/P

(B) WL/2P

(C) WL/3P

(D) WL/4P

Answer: Option C

Question No. 62

The minimum head room over a stair must be

(A) 200 cm

(B) 205 cm

(C) 210 cm

(D) 230 cm

Answer: Option C

Question No. 63

If q is the punching shear resistance per unit area a, is the side of a square footing for a column of

side b, carrying a weight W including the weight of the footing, the depth (D) of the footing from

punching shear consideration, is

(A) D = W (a - b)/4a²bq

(B) D = W (a² - b²)/4a²bq

(C) D = W (a² - b²)/8a²bq

(D) D = W (a² - b²)/4abq

Answer: Option B

Question No. 64

For initial estimate for a beam design, the width is assumed

(A) 1/15th of span

(B) 1/20th of span

(C) 1/25th of span

(D) 1/30th of span

Answer: Option D

Question No. 65

In a slab, the pitch of the main reinforcement should not exceed its effective depth

(A) Three times

(B) Four times

(C) Five times

(D) Two times

Answer: Option A

Question No. 66

If the length of a combined footing for two columns l metres apart is L and the projection on the

left side of the exterior column is x, then the projection y on the right side of the exterior column,

in order to have a uniformly distributed load, is (where is the distance of centre of gravity of

column loads).

(A) y = L - (l - )

(B) y = L/2 + (l - )

(C) y = L/2 - (l + )

(D) y = L/2 - (l - )

Answer: Option D

Question No. 67

Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and

from the base at a distance of

(A) h/4

(B) h/3

(C) h/2

(D) 2h/3

Answer: Option B

Question No. 68

If the tendon is placed at an eccentricity e below the centroidal axis of the longitudinal axis of a

rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme

top edge

(A) Is increased by PZ/e

(B) Is increased by Pe/Z

(C) Is decreased by Pe/Z

(D) Remains unchanged

Answer: Option C

Question No. 69

The Young's modulus of elasticity of steel, is

(A) 150 KN/mm2

(B) 200 KN/mm2

(C) 250 KN/mm2

(D) 275 KN/mm2

Answer: Option D

Question No. 70

Design of a two way slab simply supported on edges and having no provision to prevent the

corners from lifting, is made by

(A) Rankine formula

(B) Marcus formula

(C) Rankine Grashoff formula

(D) Grashoff formula

Answer: Option C

Question No. 71

Spacing of stirrups in a rectangular beam, is

(A) Kept constant throughout the length

(B) Decreased towards the centre of the beam

(C) Increased at the ends

(D) Increased at the centre of the beam

Answer: Option D

Question No. 72

As per IS : 456, the reinforcement in a column should not be less than

(A) 0.5% and not more than 5% of cross-sectional area

(B) 0.6% and not more than 6% of cross-sectional area

(C) 0.7% and not more than 7% of cross-sectional area

(D) 0.8% and not more than 8% of cross-sectional area

Answer: Option D

Question No. 73

The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is

(A) 1400 kg/cm2

(B) 190 kg/cm2

(C) 260 kg/cm2

(D) 230 kg/cm2

Answer: Option A

Question No. 74

Bottom bars under the columns are extended into the interior of the footing slab to a distance

greater than

(A) 42 diameters from the centre of the column

(B) 42 diameters from the inner edge of the column

(C) 42 diameters from the outer edge of the column

(D) 24 diameters from the centre of the column

Answer: Option C

Question No. 75

Pick up the assumption for the design of a pre-stressed concrete member from the following:

(A) A transverse plane section remains a plane after bending

(B) During deformation limits, Hook's law is equally applicable to concrete as well as to steel

(C) Variation of stress in reinforcement due to changes in external loading is negligible

(D) All the above

Answer: Option D

Question No. 76

The advantage of reinforced concrete, is due to

(A) Monolithic character

(B) Fire-resisting and durability

(C) Economy because of less maintenance cost

(D) All the above

Answer: Option D

Question No. 77

An R.C.C. column is treated as short column if its slenderness ratio is less than

(A) 30

(B) 35

(C) 40

(D) 50

Answer: Option D

Question No. 78

The zone in which transverse bending is likely to occur may be obtained by drawing a line from the

(A) 30°

(B) 45°

(C) 60°

(D) None of these

Answer: Option B

Question No. 79

The thickness of the topping of a ribbed slab, varies between

(A) 3 cm to 5 cm

(B) 5 cm to 8 cm

(C) 8 cm to 10 cm

(D) 12 cm to 15 cm

Answer: Option B

Question No. 80

If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept

(A) 4.5 m

(B) 4.0 m

(C) 3.5 m

(D) 3.0 m

Answer: Option A

Question No. 81

If L is the effective span of a R.C.C. beam which is subjected to maximum shear qmax at the ends,

the distance from either end over which stirrups for the shear, are provided, is

(A) (L/2) (1 - 3/qmax)

(B) (L/3) (1 - 5/qmax)

(C) (L/2) (1 - 5/qmax)

(D) (L/2) (1 - 2/qmax)

Answer: Option C

Question No. 82

The angle of internal friction of soil mass is the angle whose

(A) Tangent is equal to the rate of the maximum resistance to sliding on any internal inclined

plane to the normal pressure acting on the plane

(B) Sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane

to the normal pressure acting on the plane

(C) Cosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane

to the normal pressure acting on the plane

(D) None of these

Answer: Option A

Question No. 83

The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is

(A) 25

(B) 30

(C) 35

(D) 40

Answer: Option C

Question No. 84

If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the

corresponding load per square metre of the horizontal area, is

(A) w (R + T)/T

(B) w (R² + T²)/T

(C) w (R + T)/T

(D) w (R/T)

Answer: Option B

Question No. 85

If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be

provided should be.

(A) Straight below centroidal axis

(B) Parabolic with convexity downward

(C) Parabolic with convexity upward

(D) Straight above centroidal axis

Answer: Option B

Question No. 86

For normal cases, stiffness of a simply supported beam is satisfied if the ratio of its span to its

overall depth does not exceed

(A) 10

(B) 15

(C) 20

(D) 25

Answer: Option C

Question No. 87

If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the

pre-stressed beam is L, the upward uniform pressure will be

(A) 8hp/l

(B) 8hp/l²

(C) 8hl/p

(D) 8hl/p²

Answer: Option B

Question No. 88

If depth of slab is 10 cm, width of web 30 cm, depth of web 50 cm, centre to centre distance of

beams 3 m, effective span of beams 6 m, the effective flange width of the beam, is

(A) 200 cm

(B) 300 cm

(C) 150 cm

(D) 100 cm

Answer: Option C

Question No. 89

The steel generally used in R.C.C. work, is

(A) Stainless

(B) Mild steel

(C) High carbon steel

(D) High tension steel

Answer: Option B

Question No. 90

If the ratio of long and short spans of a two way slab with corners held down is r, the actual

reduction of B.M. is given by

(A) (5/6) (r/1 + r²) M

(B) (5/6) (r²/1 + r²) M

(C) (5/6) (r²/1 + r3) M

(D) (5/6) (r²/1 + r4) M

Answer: Option D

Question No. 91

A part of the slab may be considered as the flange of the T-beam if

(A) Flange has adequate reinforcement transverse to beam

(B) It is built integrally with the beam

(C) It is effectively bonded together with the beam

(D) All the above

Answer: Option D

Question No. 92

By over-reinforcing a beam, the moment of resistance can be increased not more than

(A) 10 %

(B) 15 %

(C) 20 %

(D) 25 %

Answer: Option D

Question No. 93

Total pressure on the vertical face of a retaining wall of height per unit run exerted by the

retained earth weighing per unit volume, is

(A) wh [(1 - )/(1 + sin )]

(B) wh² [(1 - )/(1 + sin )]

(C) wh² [(1 - )/2(1 + sin )]

(D) wh² [(1 - )/3(1 + sin )]

Answer: Option C

Question No. 94

A singly reinforced beam has breadth b, effective depth d, depth of neutral axis n and critical

neutral axis n1. If fc and ft are permissible compressive and tensile stresses, the moment to

resistance of the beam, is

(A) bn (fc/2) (d - n/3)

(B) Atft (d - n/3)

(C) ½ n1 (1 - n1/3) cbd²

(D) All the above

Answer: Option D

Question No. 95

According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is

kept less than

(A) 5 cm

(B) 10 cm

(C) 15 cm

(D) 20 cm

Answer: Option C

Question No. 96

If l1 and l2 are the lengths of long and short spans of a two way slab simply supported on four

edges and carrying a load w per unit area, the ratio of the loads split into w1 and w2acting on strips

parallel to l2 and l1 is

(A) w1/w2 = l2/l1

(B) w1/w2 = (l2/l1)²

(C) w1/w2 = (l2/l1)3

(D) w1/w2 = (l2/l1)4

Answer: Option D

Question No. 97

The live load to be considered for an accessible roof, is

(A) Nil

(B) 75 kg/m3

(C) 150 kg/m2

(D) 200 kg/cm2

Answer: Option C

Question No. 98

If Ac, Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and

c are the modular ratio and maximum stress in the configuration of concrete, the strength of

column is

(A) cAc + m cAsc

(B) c(A - Asc) + m cAsc

(C) c[A + (m - 1)ASC]

(D) All the above

Answer: Option D

Question No. 99

On an absolutely rigid foundation base, the pressure will

(A) Be more at the edges of the foundation

(B) Be uniform

(C) Not be uniform

(D) Be zero at the centre of the foundation

Answer: Option C

Question No. 100

The diameter of transverse reinforcement of columns should be equal to one-fourth of the

diameter of the main steel rods but not less than

(A) 4 mm

(B) 5 mm

(C) 6 mm

(D) 7 mm

Answer: Option D

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Air Pollution -4

1. Which of the following is used in ceramic industries

A Electrostatic Precipitators

B Dynamic precipitator

C Spray Tower

D Wet cyclonic scrubber

Answer: B

2. Which of the following removes both gaseous and particulate contaminants

A Venturi Scrubbers

B Gravitational Settling Chambers

C ESP

D Wet Scrubbers

Answer: A

3. Which of the following is the absorption unit?

A Cyclone collector

B Plate tower

C Gravitation settling chamber

D Dynamic precipitator

Answer: B

4. Which of the following is not a part of adsorption unit?

A Packed towers

B Multiple fixed bed

C Fluidized bed

D Moving bed

Answer: A

5. Which of the following is a bulk phenomena?

A Physical adsorption

B Chemical adsorption

C Absorption

D Sorption

Answer: C

6. Which of the following is not type of air pollution cotrol by process change

A Substitution of raw material

B Control equipment

C Replacement of process equipment

D Modification of process itself

Answer: B

7. Objective of using Control Equipment is

A Prevention of Nuisance

B Elimination of health hazards

C Improvement of product quality

D All of the above

Answer: D

8. The function of automobile catalytic converter is to control emission of

A CO2 & H

B CO & H

C CO & CO2

D CO & NO2

Answer: B

9. Stokes Law is applicable if

A (h/Vs)=(L/V)

B (V/L)=(h/Vs)

C (Vs/h)=(V/L)

All of the above

Answer: A

10. In design of Cyclone

A Bc= Dc/2

B Bc=Dc/4

C Bc=Dc/8

D Bc=Dc/5

Answer: B

11. Cyclones can be used in

A Paper & Pulp Mills

B Textile Industries

C Cement Manufacturing

D All of the above

Answer: D

12. The control equipment that utilises electrical energy directly to assist in removal of particulates matter is

A Cyclone collector

B Fabric Filter

C Electrostatic Precipitator

D Wet Collectors

Answer: C

13. Which of the following is not a principle of Wet Scrubbers

A Absorption

B Impingement

C Interception

D Diffusion

Answer: A

14. Which of the following is type of wet scrubbers

A Venturi Scrubbers

B Spray Tower

C Cyclone Scrubbers

D All of the above

Answer: A

15. Gaseous Pollution can be control by

A Absorption

B Adsorption

C Recovery System

D All of the above

Answer: D

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Air Pollution-3

1. Which of the following is not causes of indoor air pollution

A Improper Ventilation

B Absorption

C Fluorescent lamps

D Use of synthetic materials

Answer: B

2. Which of the following is not type of Electromagnetic pollution

A Tube lights

B Carpets

C Dust

D Air Conditioning

Answer: B

3. Electromagnetic Pollution is responsible to cause disease like____

A Brain Cancer

B Leukemia

C Bone Marrow Damage

D All above mentioned

Answer: D

4. The pulmonary section of the respiratory tract consists of ___________

A Nose and mouth as well as down till epiglottis and larynx

B Bronchi down till the end of bronchiole

C Respiratory bronchiole, alveoli and alveoli 

D Alveoli ducts and alveoli

Answer: C

5. Which of the following is used for Disinfection

A UV Radiation

B Triethylene 

C Application of oil to floors

D All above 

Answer: D

6. Particles of what size are filtered by the nasal passage?

A >10micrometre

B >500 micrometre

C >1 mm

D >5 micrometre

Answer: A 

7. Which of the following is not Air Cleaning System

A Adsorption

B Disinfection

C Lighting

D Plantation

Answer: A

8. The system in which fresh air is blown into the room by centrifugal fans so as to create positive pressure and displace the vitiated air is

A Exhaust Ventilation

B Plenum Ventilation

C Balanced Ventilation

D Air Conditioning

Answer: B

9. Which of the following are Indoor Air Plants

A Peace Lilly

B Areca Palm

C Gerbera Daisy

D All above mentioned

Answer: D

10. Odour can be defined as

A Perception of smell

B Bad Smell

C Sweet Smell

D Complex Smell

Answer: A

11. Odorous substance Mercaptans is released from

A Petroleum Industry

B Paper and Pulp Mill

C Cotton Industry

D Tanneries

Answer: B

12. Measurement of Odour can be done by

A Osmometer

B Determination of Threshold 

C Determination of type and intensity of atmospheric odur

D All above mentioned

Answer: D

13. The relationship between odour intensity and concentration can be expressed as

A P=L Log S

B l=P Log S

C S= P Log L

D P=S Log L

Answer: A

14. Odour can be control by

A Absorption

B Adsorption

C Combustion

D All above mentioned

Answer: D

15. Certain pairs of odours in appropriate relative concentration are mixed together so that intensity of each odour is diminished is the phenomenon of

A Odour Masking

B Odour Counteraction

C Neutralization

D Absorption

Answer: B

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Air Pollution-2

1. In-situ cross stack analysers work behind which of the following principles?

A Differential absorption spectroscopy

B Gas-filter correlation spectroscopy

C Differential absorption & Gas-filter correlation spectroscopy

D None of the mentioned

Answer: C

2. The permissible concentration of PM 10 in air is

A 60µg/m3

B 40µg/m3

C 50µg/m3

D 20µg/m3

Answer: A

3. Sampling should always be carried under conditions of

A Isokinetic

B Sub-Isokinetic

C Super-Isokinetic

D All of the above

Answer: A

4. The efficiency of collection by impingement is high for the particles whose diameter is  ----- or greater

A 0.001µ

B 1 µ

C 0.5 µ

D 0.01 µ

Answer: B

5. When velocity in probe is greater than velocity in stack _____ condition is achived

A Isokinetic

B Sub-Isokinetic

C Super-Isokinetic

D All the above

Answer:  C

6. Which of the following is objective of Sampling

A Formulating and testing air pollution models

B Scientific Investigations

C Specify sources

D All of the above

Answer: D

7. Which of the following is not a sampling device

A Absorber's

B Sedimentation

C Condensers

D Plastic containers

Answer: B

8.What is Air Quality Index

A It tells about sound pollution

B Measures SO2 concentration

C Measures ozone levels in your area

D Checks colour of air

Answer: C

9. What is the primary standard level for carbon monoxide for assuring air quality?

A 10ppm

B 90ppm

C 1ppm

D 9ppm

Answer:  D

10. Sample is said to be collected as Isokinetic Sampling when______

A Vp > Vs

B Vp = Vs

C Vp =<Vs

D All the above

Answer: B

11. Which of the following analyser is used for oxygen analysis?

A Electrocatalytic

B Polarographic

C Conductive

D Amperometry

Answer: A

12. In-situ in-stack analysers are used for measuring concentrations of which of the following gases

A Ammonia

B Sulphur dioxide

C Nitrogen monoxide

D All of the above

Answer: D

13. Stages of sampling includes:

A Statistical studies

B Continuous and Intermittent Sampling

C Size of Sample

D All of the above

Answer: D

14. Electroanalytical monitors rely on which of the following methods?

A Polarography and amperometric analysis

B Polarography and electrocatalysis

C Polarography, electrocatalysis and conductivity

D All of the above 

Answer: D

15. Potential difference of _________ is applied for Electrostatic Precipitator

A 5-10kv

B 12-30kV

C 100kv

D 1-15kv

Answer: B

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Air Pollution-1

1. Which of the following are not natural sources of pollutant?

A SO2

B H2S

C Radioactive fallout

D Fungal pores

Answer C

2.Which of the following gases vary significantly over time and place at the atmospheric boundary?

A Carbon Dioxide

B Water vapour

C Ozone

D Oxygen

Answer B

3. How does atmospheric pressure vary with increase in altitude?

A Decreases linearly

B Decreases exponentially

C Increases linearly

D Increase till stratosphere and then starts decresing with altitude

Answer B

4. When the reverse lapse rate occur, a dense cold stratum of air at ground level gets covered by lighter warmer air at higher level is known as

A Lapse rate

B Inversion

C Adiabatic lapse rate

D None of above

Answer B

5. Plume behaviour that occurs during warm seasons and clear skies associated with turbulent winds is….

A Coning

B Fanning

C Lofting

D Looping

Answer D

6. Which of the following is bad case of atmospheric condition for dispersion

A Fumigation

B Trapping

C Coning

D Fanning

Answer A

7. Factors Affecting Plume Rise are

A Exit velocity

B Wind Speed

C Lapse Rate

D All of the above

Answer D

8. According to BIS, a minimum stack height is

A 20m

B 40m

C 30m

D 50m

Answer C

9. What is SO2 emission rate if a thermal power plant burns 5.45 tonnes with 4.2% sulphur per hr

A 125.2 gm/sec

B 127.2 gm/sec

C 57gm/sec

D 121.2gm/sec

Answer B

10. Which of the following is secondary pollutant.

A SPM

B PAN

C SO2

D NO2

Answer B

11. When environmental Lapse Rate (ELR) is less is than Adiabatic Lapse Rate (ALR), then which of the following occurs?

A Sub adiabatic lapse rate

B Super adiabatic lapse rate

C Neutral lapse rate

D Adiabatic lapse rate

Answer A

12. Determine effective stack height of stack with following data: 

Stack ht-205m , Wind velo-3.56m/s, air temp-13℃, pressure-1000milibars, stack  gas velo-9.14m/s, stack gas temp-140℃.

A 211.54m

B 200m

C 300m

D 6.54m

Answer A

13. In Gaussian Equation σy  and σz indicates

A Pollutant release rate

B Effective height

C Standard deviations

D Concentration

Answer C

14. Which of the following are not natural sources of pollutant?

A SO2

B H2S

C Radioactive fallout

D Fungal pores

Answer C

15. Estimate stack height for particulate release rate of 875kg/hr.

A 100m

B 106.8m

C 60.3m

D 40m

Answer B

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Construction Management-3

1 Scheduling of a project is affected by following things 

A Type of project

B Nature of activities

C Availability of resources 

D All of the Above

Answer: A

2 The WBS Structure is a ------ structure

A Triangle

B Matrix

C Square

D Tree

Answer: D

3 What is the principle to be used when deciding how many levels deep a Work Breakdown Structure (WBS) should be “broken down” to?

A  Use the WBS breakdown provided with the WBS template in the project management methodology.       that is the correct level for each task

B Break down all tasks and activities within the WBS to tasks of no more than 8 hours of duration so            that a task or activity will have a status update every day

C Break down tasks and activities in the WBS to the level at which the project core team will be                  managing and reporting on during project meetings.

D None of the above

Answer: D

4 A dummy activity

A Is artificially introduced

B Is represented by a dotted line

C Does not consume time

D All the above 

Answer: D

5 Work study consists of

A Effective use of plant and equipment

B Effective use of human effort

C Evaluation of human work

D All of the above

Answer: B

6 In process charts, the symbol used for inspection is

A Circle

B Square

C Arrow

D Triangle

Answer: B

7 Two hand process chart is commonly used for

A Repetitive operations

B Short operations

C Both ‘a’ and ‘b’

D None of the above

Answer: C

8 There are repetitive work cycles of short to long duration and wide variety of dissimilar work is performed is known as -------

A Time Study

B Motion Study

C Both of above

D None of the above

Answer: A

9 U.S Navy developed technique which is used to plan the construction of repetitive structural units is 

A ABC 

B LOB 

C both of the above

D None

Answer: B

10 The schedule is classified according to its use as

A Material ,Labour

B Equipment, Finance

C Both a and b

D None of the above

Answer: C

11 The WBS is depend upon the ------ and ------

A Shape and complexity

B Size and Complexity

C Level and Size

D None of the above 

Answer: B

12 What does a Work Breakdown Structure (WBS) “break down?”

A Project deliverables are broken down into tasks and activities

B The structural elements of the project facility and equipment are broken down for inventory and               tracking purposes

C Project costs are broken down into the departments where they are charged

D None of the above

Answer: A

13 A Milestone chart

A Shows the interdependencies of various jobs

B Depicts the delay of jobs, if any

C Points outgoing ahead of schedule of jobs, if any

D None of these.

Answer: D

14 The correct order of procedure in method study is

A Select – Record – Examine – Develop – Define – Install – Maintain

B Select – Define – Examine – Develop – Record – Install – Maintain

C Select – Record – Develop – Examine – Define – Install – Maintain

D Select – Record – Examine – Define – Develop – Install – Maintain

Answer: A

15 Which of the following is a scale plan?

A String diagram

B Flow process chart

C Operation process chart

D All of the above

Answer: A

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Construction Management-2

1. Frederick W. Taylor introduced a system of working known as

A Line organization

B Line and staff organization

C Functional organization

D Effective organization

Answer: C

2. CPM is

A Synthesising in concepts

B Is built of activities oriented programme

C Is based on time estimate

D All the above

Answer: D 

3. The Overall in-charge of an organization at the site responsible for the execution of the works, is

A Executive Engineer

B Engineer

C Junior Engineer

D Assistant Engineer

Answer: B

4. Consider the following features/factors:

1. Projects are of the non-repetitive type

2. Time required need not be known

3. Time required is known precisely

4. Events have been established for planning

5. Emphasis is given to activities of project

 PERT is preferred for planning because of

A 1, 2 and 4

B 3, 4 and 5

C 1, 3 and 4

D 1, 2 and 5

Answer: A

5. The first stage of a construction, is

A Preparation of estimate

B Survey of the site

C Initiation of proposal

D Preparation of tender

Answer:  C

6. Residential buildings are treated as

A Light construction

B Heavy construction

C Industrial construction

D Private construction

Answer:  A

7. The salient feature of functional organization is

A Strict adherence to specifications

B Separation of planning and design part

C Each individual maintains functional efficiency

D All the above

Answer: D

8. The main principle of an organization, is

A Unity of command

B Effective control at all levels

C Delegation of authority

D All the above

Answer:  D

9. Railway projects are treated as

A Light construction

B Heavy construction

C Industrial construction

D None of these

Answer:  B

10. The main disadvantage of line organisation, is      

A Rigid structure

B Extraordinary delay in communications

C Top level executions over work

D All the above.

Answer: D

11 The final selection of a construction site, is done by

A Departmental representative or user

B Local civil authority representative

C Representative of engineer authority

D All the above.

Answer:  D

12 Following is(are) the responsibility(ies) of the project manager.

A Budgeting and cost control

B Allocating resources

C Tracking project expenditure

D All of the above

Answer:  D

13 Following are the phases of Project Management Life Cycle. Arrange them in correct order

  1.Design, 2. Marketing, 3. Analysis and evaluation, 4. Inspection, testing and delivery

A 3-2-1-4

B 1-2-3-4

C 2-3-1-4

D 4-3-2-1

Answer:  A

14 Five dimensions that must be managed on a project

A Constraint, Quality, Cost, Schedule, Staff

B Features, Quality, Cost, Schedule, Staff

C Features, priority, Cost, Schedule, Staff

D Features, Quality, Cost, Schedule, customer

Answer:  B

15. Five dimensions that must be managed on a project

A Constraint, Quality, Cost, Schedule, Staff

B Features, Quality, Cost, Schedule, Staff

C Features, priority, Cost, Schedule, Staff

D Features, Quality, Cost, Schedule, customer

Answer:  B

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