CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D) is less than

2.5

4.5

3.5

5.5

TRUE ANSWER : ?
YOUR ANSWER : ?

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

both (ii) and (iii)

only (i)

only (ii)

both (i) and (iv)

TRUE ANSWER : ?
YOUR ANSWER : ?

Poisson’s ratio for concrete

increases with richer mixes

remains constant

None of these

decreases with richer mixes

TRUE ANSWER : ?
YOUR ANSWER : ?

The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called

bulking

segregation

bleeding

creep

TRUE ANSWER : ?
YOUR ANSWER : ?

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

45 m

20 m

30 m

60 m

TRUE ANSWER : ?
YOUR ANSWER : ?

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

2.5

2

3

1.5

TRUE ANSWER : ?
YOUR ANSWER : ?

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

(i) and (ii) are correct

only (ii) is correct

only (iv) is correct

(iii) and (iv) are correct

TRUE ANSWER : ?
YOUR ANSWER : ?

Examine the following statements : i) Factor of safety for steel should be based on its yield stress, ii) Factor of safety for steel should be based on its ultimate stress, iii) Factor of safety for concrete should be based on its yield stress, iv) Factor of safety for concrete should be based on its ultimate stress. The correct statements are

(i) and (iv)

(ii) and (iii)

(i) and (iii)

(ii) and (iv)

TRUE ANSWER : ?
YOUR ANSWER : ?

Select the correct statement for

High tensile steel is cheaper than mild steel

Elastic modulus of high tensile steel is more than that of mild steel

Elastic modulus of high tensile steel is nearly the same as that of mild steel

Carbon percentage in high carbon steel is less than that in mild steel

TRUE ANSWER : ?
YOUR ANSWER : ?

If a beam fails in bond, then its bond strength can be increased most economi-cally by

providing vertical stirrups

using thicker bars but less in number

increasing the depth of beam

using thinner bars but more in number

TRUE ANSWER : ?
YOUR ANSWER : ?