CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

The minimum diameter of longitudinal bars in a column is

6 mm

16 mm

8 mm

12 mm

TRUE ANSWER : ?
YOUR ANSWER : ?

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

counterfort type

All of these

T-shaped wall

L-shaped wall

TRUE ANSWER : ?
YOUR ANSWER : ?

The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone

tensile stress

shear stress

compressive stress

bond stress

TRUE ANSWER : ?
YOUR ANSWER : ?

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

using thicker bars but less in number

providing vertical stirrups

using thinner bars but more in number

increasing the depth of beam

TRUE ANSWER : ?
YOUR ANSWER : ?

In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided oni) bottom face near counterfortii) top face near counterfortiii) bottom face near centre of spaniv) top face near centre of span The correct answer is

only (i)

only (ii)

both (i) and (iv)

both (ii) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

As compared to ordinary portland cement, use of pozzuolanic cement

increases strength

increases bleeding

increases shrinkage

reduces workability

TRUE ANSWER : ?
YOUR ANSWER : ?

Shrinkage of concrete depends uponi) humidity of atmosphereii) passage of timeiii) stress The correct answer is

(i) and (ii)

(ii) and (iii)

All (i), (ii) and (iii)

only (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

While designing the pile as a column, the end conditions are nearly

both ends fixed

both ends hinged

one end fixed and other end hinged

one end fixed and other end free

TRUE ANSWER : ?
YOUR ANSWER : ?

Diagonal tension in a beam

Decreases below the neutral axis and increases above the neutral axis

Remains same

Is maximum at neutral axis

Increases below the neutral axis and decreases above the neutral axis

TRUE ANSWER : ?
YOUR ANSWER : ?

If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be

0.35 d

dependent on grade of concrete also

0.40 d

0.45 d

TRUE ANSWER : ?
YOUR ANSWER : ?

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