CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

A T-shaped retaining wall mainly conssits of

one cantilever

two cantilevers

four cantilevers

three cantilevers

TRUE ANSWER : ?
YOUR ANSWER : ?

For a continuous slab of 3 m x 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is

100 mm

75 mm

50 mm

120 mm

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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

(ii) and (iv)

(i) and (iv)

(i) and (iii)

(ii) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Using thinner bars but more in number

Increasing the depth

Using high strength steel

Providing shear reinforcement

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YOUR ANSWER : ?

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

30 m

20 m

45 m

60 m

TRUE ANSWER : ?
YOUR ANSWER : ?

Stress strain curve of high tensile steel

does not show definite yield point but yield point is defined by 2% proof stress,

does not show definite yield point but yield point is defined by 0.1% proof stress

has a definite yield point

does not show definite yield point but yield point is defined by 0.2% proof stress

TRUE ANSWER : ?
YOUR ANSWER : ?

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

All of these

T-shaped wall

counterfort type

L-shaped wall

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YOUR ANSWER : ?

Sinking of an intermediate support of a continuous beam i) reduces the negative moment at support ii) increases the negative moment at support iii) reduces the positive moment at center of span iv) increases the positive moment at center of span The correct answer is

(i) and (iv)

(i) and (iii)

(ii) and (iii)

(ii) and (iv)

TRUE ANSWER : ?
YOUR ANSWER : ?

The design yield stress of steel according to IS: 456-1978 is (where fy is the characteristic yield strength of steel)

0.87 fy

0.67 fy

0.37 fy

0.57 fy

TRUE ANSWER : ?
YOUR ANSWER : ?

If the depth of neutral axis for a singly reinforced rectangular section is represented by kd in working stress design, then the value of k for balanced section

depends on both crst and acbc

depends on aCbC only

is independant of both ast and acbc where d is the effective depth, ast is per-missible stress in steel in tension and ocbc is permissible stress in concrete in bending compression.

depends on as, only

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