CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

The percentage of reinforcement in case of slabs, when high strength deformed bars are used is not less than

0.13

0.12

0.14

0.15

TRUE ANSWER : ?
YOUR ANSWER : ?

In a ring beam subjected to uniformly distributed load i) shear force at mid span is zero ii) shear force at mid span is maximum iii) torsion at mid span is zero iv) torsion at mid span is maximum The correct answer is

(ii) and (iii)

(ii) and (iv)

(i) and (iv)

(i) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

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

30 m

60 m

45 m

20 m

TRUE ANSWER : ?
YOUR ANSWER : ?

For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than

50 mm

60 mm

45mm

40 mm

TRUE ANSWER : ?
YOUR ANSWER : ?

In counterfort type retaining walls i) the vertical slab is designed as a continuous slab ii) the heel slab is designed as a continuous slab iii) the vertical slab is designed as a cantilever iv) the heel slab is designed as a cantilever The correct answer is

(iii) and (iv)

(i) and (iv)

(i) and (ii)

(ii) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

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

10 mm

20 mm

30 mm

15 mm

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

(ii) and (iv)

(i) and (iv)

(i) and (iii)

(ii) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

Select the incorrect statement...

Pretensioning system has greater certainty about its durability.

The loss of prestress is more in pre-tensioning system than in post-tensioning system.

For heavy loads and large spans in buildings or bridges, post-tensioning system is cheaper than pretensioning system

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

2 %

6 %

8 %

4%

TRUE ANSWER : ?
YOUR ANSWER : ?

In prestressed concrete

forces of tension and compression change but lever arm remains unchanged

both forces of tension and compres-sion as well as lever arm change

both forces of tension and compres-sion as well as lever arm remain unchanged

forces of tension and compressions remain unchanged but lever arm changes with the moment

TRUE ANSWER : ?
YOUR ANSWER : ?