site engineer Interview Questions | Top 50 Q&A

According to IS : 456-1978, the column or the strut is the member whose effective length is greater than

a) the least lateral dimension

b) 2 times the least lateral dimension

c) 3 times the least lateral dimension

d) 4 times the least lateral dimension

According to IS : 456- 1978, minimum slenderness ratio for a short column is

a) less than 12

b) less than 18

c) between 18 and 24

d) more than 24

Lap length in compression shall not be less than

a) 15 Φ

b) 20 Φ

c) 24 Φ

d) 30 Φ

where (Φ) is diameter of bar

The minimum cover in a slab should neither be less than the diameter of bar nor less

than

a) 10 mm

b) 15 mm

c) 25 mm

d) 13 mm

For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less

than the diameter of bar nor less than

a) 15 mm

b) 25 mm

c) 30mm

d) 40 mm

The ratio of the diameter of reinforcing bars and the slab thickness is

a) 1/4

b) 1/5

c) 1/6

d) 1/8

According to IS: 456-1978, the maximum reinforcement in a column is

a) 2 %

b) 4%

c) 6 %

d) 8 %

The percentage of reinforcement in case of slabs, when high strength deformed bars

are used is not less than

a) 0.15

b) 0.12

c) 0.30

d) 1.0059.

Which of the following statements is incorrect ?

a) Minimum cross sectional area of longitudinal reinforcement in a column is 0.8%.

b) Spacing of longitudinal bars measured along the periphery of column should not exceed

300 mm.

c) Reinforcing bars in a column should not be less than 12 mm in diameter.

d) The number of longitudinal bars pro-vided in a circular column should not be less than

four.

Which of the following statements is incorrect ?

a) Higher Vee-Bee time shows lower workability.

b) Higher slump shows higher workability.

c) Higher compacting factor shows higher workability.

d) none of the above

Minimum pitch of transverse reinforcement in a column is

a) the least lateral dimension of the member

b) sixteen times the smallest diameter of longitudinal reinforcement bar to be tied

c) forty-eight times the diameter of transverse reinforcement

d) lesser of the above three values

Maximum distance between expansion joints in structures as per IS : 456 – 1978 is

a) 20 m

b) 30 m

c) 45 m

d) 60 m

A continuous beam is deemed to be a deep beam when the ratio of effective span to

overall depth (1/D) is less than

a) 1.5

b) 2.0

c) 2.5

d) 3.0

Critical section for shear in case of flat slabs is at a distance of

a) effective depth of slab from periphery of column/drop panel

b) d/2 from periphery of column/capital/ drop panel

c) at the drop panel of slab

d) at the periphery of column

Minimum thickness of load bearing RCC wall should be

a) 50 mm

b) 100 mm

c) 150 mm

d) 200 mm

If the storey height is equal to length of RCC wall, the percentage increase in strength is

a) 0

b) 10

c) 20

d) 30

In reinforced concrete footing on soil, the minimum thickness at edge should not be less

than

a) 100 mm

b) 150 mm

c) 200 mm

d) 250 mm

The slab is designed as one way if the ratio of long span to short span is

a) less than 1

b) between 1 and 1.5

c) between 1.5 and 2

d) greater than 2

Ratio of permissible stress in direct compression and bending compression is

a) less than 1

b) between 1 and 1.5

c) between 1.5 and 2.0

d) greater than 2

A higher modular ratio shows

a) higher compressive strength of con-crete

b) lower compressive strength of concrete

c) higher tensile strength of steel

d) lower tensile strength of steel

Ans:b

The average permissible stress in bond for plain bars in tension is

a) increased by 10% for bars in compression

b) increased by 25% for bars in compression

c) decreased by 10% for bars in compression

d) decreased by 25% for bars in com-pression

Ans:b

In working stress design, permissible bond stress in the case of deformed bars is more

than that in plain bars by

a) 10%

b) 20%

c) 30%

d) 40%

Ans: d

The main reason for providing number of reinforcing bars at a support in a simply

supported beam is to resist in that zone

a) compressive stress

b) shear stress

c) bond stress

d) tensile stress

Ans: c

Half of the main steel in a simply supported slab is bent up near the support at a

distance of x from the centre of slab bearing where x is equal to

a) l/3

b) l/5

c) l/7

d) l/10

where l is the span

Ans:c

When shear stress exceeds the permissible limit in a slab, then it is reduced by

a) increasing the depth

b) providing shear reinforcement

c) using high strength steeld) using thinner bars but more in number

Ans: a

If the size of panel in a flat slab is 6m x 6m, then as per Indian Standard Code, the widths

of column strip and middle strip are

a) 3.0 m and 1.5 m

b) 1.5 m and 3.0 m

c) 3.0 m and 3.0 m

d) 1.5 m and 1.5 m

Ans:c

For a slab supported on its four edges with corners held down and loaded uniformly, the

Marcus correction factor to the moments obtained by Grashoff Rankine’s theory

a) is always less than 1

b) is always greater than 1

c) can be more than 1

d) can be less than 1

Ans: a

The permissible diagonal tensile stress in reinforced brick work is

a) about 0.1 N/mm2

b) zero

c) 0.3 N/mm2 to 0.7 N/mm2

d) about 1.0 N/mm2

Ans: a

The limits of percentage p of the longitudinal reinforce-ment in a column is given by

a) 0.15% to 2%

b) 0.8% to 4%

c) 0.8% to 6%

d) 0.8% to 8%

Ans: c

The minimum diameter of longitudinal bars in a column is

a) 6 mm

b) 8 mm

c) 12 mm

d) 16 mm

Ans:c

The minimum cover to the ties or spirals should not be less than

a) 15 mm

b) 20 mm

c) 25 mm

d) 50mm

Ans: c

The load carrying capacity of a helically reinforced column as compared to that of a tied

column is about

a) 5% less

b) 10% less

c) 5% more

d) 10% more

Ans:c

The diameter of ties in a column should be

a) more than or equal to one fourth of diameter of main bar

b) more than or equal to 5 mm

c) more than 5 mm but less than one-fourth of diameter of main bar

d) more than 5 mm and also more than one-fourth of diameter of main bar

Ans: d

Due to circumferential action of the spiral in a spirally reinforced column

a) capacity of column is decreased

b) ductility of column reduces

c) capacity of column is decreased but ductility of column increases

d) both the capacity of column and ductility of column increase

Ans: d

Maximum percentage reinforcement in case of slabs is limited to

a) 2

b) 4

c) 6

d) 8

Ans: b

Which of the following R.C. retaining walls is suitable for heights beyond 6m?

a) L-shaped wall

b) T-shaped wall

c) counterfort type

d) all of the above

Ans: c

For the design of retaining walls, the minimum factor of safety against overturning is

taken as

a) 1.5

b) 2.0

c) 2.5

d) 3.0

Ans: b

In counterfort type retaining walls

i) the vertical slab is designed as a continuous slab

ii) the heel slab is designed as a conti¬nuous slab

iii) the vertical slab is designed as a cantilever

iv) the heel slab is designed as a cantilever

The correct answer is

a) (i) and (ii)

b) (i)and(iv)

c) (ii) and (iii)

d) (iii) and (iv)

Ans:a

A T-shaped retaining wall mainly consist of

a) one cantilever

b) two cantilevers

c) three cantilevers

d) four cantilevers

Ans: c

In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on

a) the front face in one direction

b) the front face in both directions

c) the inner face in one direction

d) the inner face in both directionsAns:c

The main reinforcement in the toe of a T- shaped R C. retaining wall is provided on

i) top face parallel to the wall

ii) top face perpendicular to the wall

iii) bottom face paralleUo the wall

iv) bottom face perpendicular to the wall

The correct answer is

a) only (ii) is correct

b) (i) and (ii) are correct

c) (iii) and (iv) are correct

d) only (iv) is correct

Ans: d

The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is

a) not needed

b) provided equally on inner and front faces

c) provided more on inner face than on front face

d) provided more on front face than on inner face

Ans: d

The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on

a) top face perpendicular to wall

b) bottom face perpendicular to wall

c) both top and bottom faces perpendi-cular to wall

d) none of the above

Ans: a

In a counterfort retaining wall, the main reinforcement is provided on the

i) bottom face in front counterfort

ii) inclined face in front counterfort

iii) bottom face in back counterfort

iv) inclined face in back counterEort

The correct answer is

a) (i) and (ii),

b) (ii) and (iii)

c) (i) and (iv)

d) (iii) and (iv)

Ans: c

In counterfort retaining walls, the main reinforcement in the stem at support is

a) not provided

b) provided only on inner face

c) provided only on front face

d) provided both on inner and front faces

Ans: b

In the design of a front counterfort in a counterfort retaining wall, the main reinforcement

is provided on

i) bottom face near counterfort

ii) top face near counterfort

iii) bottom face near centre of span

iv) top face near centre of span The correct answer is

a) only (i)

b) only (ii)

c) both (i) and (iv)

d) both (ii) and (iii)

Ans: c

In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided

on

a) front face only

b) inner face only

c) both front face and inner face

d) none of the above

Ans: a