CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

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

Ductility of column reduces

Capacity of column is decreased

Capacity of column is decreased but ductility of column increases

Both the capacity of column and ductility of column increase

TRUE ANSWER : ?
YOUR ANSWER : ?

Prestress loss due to friction occurs

only in post-tensioned beams

only in pretensioned beams

in both post-tensioned and preten-sioned beams

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Provided both on inner and front faces

Provided only on inner face

Not provided

Provided only on front face

TRUE ANSWER : ?
YOUR ANSWER : ?

For a simply supported beam of span 15m, the minimum effective depth to satisfy the vertical deflection limits should be

600 mm

900 mm

more than 1 m

750 mm

TRUE ANSWER : ?
YOUR ANSWER : ?

Most common method of prestressing used for factory production is

Lee-Macall system

Freyssinet system

Long line method

Magnel-Blaton system

TRUE ANSWER : ?
YOUR ANSWER : ?

Modulus of elasticity of steel as per IS : 456-1978 shall be taken as

20 kN/cm²

200 kN/cm²

200kN/mm²

2xl06N/cm²

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

60 mm

45mm

40 mm

50 mm

TRUE ANSWER : ?
YOUR ANSWER : ?

In case of hand mixing of concrete, the extra cement to be added is

5%

10%

20%

15%

TRUE ANSWER : ?
YOUR ANSWER : ?

A T-shaped retaining wall mainly conssits of

three cantilevers

four cantilevers

two cantilevers

one cantilever

TRUE ANSWER : ?
YOUR ANSWER : ?

In order to obtain the best workability of concrete, the preferred shape of aggregate is

All of these

angular

elongated

rounded

TRUE ANSWER : ?
YOUR ANSWER : ?

↑