# Civil Engineering - RCC Structures Design

6.
Piles are usually driven by
diesel operated hammer
drop hammer
single acting steam hammer
all the above.
Explanation:
No answer description is available. Let's discuss.

7.
In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength
100 kg/cm2
200 kg/cm2
300 kg/cm2
400 kg/cm2
500 kg/cm2
Explanation:
No answer description is available. Let's discuss.

8.
The angle of internal friction of soil mass is the angle whose
tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane
sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane
cosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane
none of these.
Explanation:
No answer description is available. Let's discuss.

9.
The anchorage value of a hook is assumed sixteen times the diameter of the bar if the angle of the bend, is
30°
40°
45°
60°
all the above.