CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

In prestressed concrete

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

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 compression change but lever arm remains unchanged

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

40 mm

45mm

60 mm

50 mm

TRUE ANSWER : ?
YOUR ANSWER : ?

The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on

top face perpendicular to wall

None of these

bottom face perpendicular to wall

both top and bottom faces perpendicular to wall

TRUE ANSWER : ?
YOUR ANSWER : ?

The compressive strength of 100 mm cube as compared to 150 mm cube is always

None of these

equal

more

less

TRUE ANSWER : ?
YOUR ANSWER : ?

Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is

34 liters

28 liters

32 liters

30 liters

TRUE ANSWER : ?
YOUR ANSWER : ?

For a reinforced concrete section, the shape of shear stress diagram is

parabolic above neutral axis and rectangular below neutral axis

wholly parabolic

wholly rectangular

rectangular above neutral axis and parabolic below neutral axis

TRUE ANSWER : ?
YOUR ANSWER : ?

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

(ii) and (iv)

(ii) and (iii)

(i) and (iii)

(i) and (iv)

TRUE ANSWER : ?
YOUR ANSWER : ?

As compared to ordinary portland cement, use of pozzuolanic cement

increases shrinkage

reduces workability

increases bleeding

increases strength

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum value of hoop compression in a dome is given by (where, w = load per unit area of surface of dome R = radius of curvature d = thickness of dome)

2wR/d

wR/2d

wR / 4d

wR/d

TRUE ANSWER : ?
YOUR ANSWER : ?

Stress strain curve of high tensile steel

has a definite yield point

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

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

TRUE ANSWER : ?
YOUR ANSWER : ?

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