# Civil Engineering - UPSC Civil Service Exam Questions

6.
A sewer is laid from a manhole A to a manhole B, 250 m apart along a downward gradient of 1 in 250. If the reduced level of the invert at A is 205.75 m and the height of the boring rod is 3 m, then, reduced level of the sight rail at B, is
202.75 m
206.75 m
208.75 m
211.75 m
Explanation:
No answer description is available. Let's discuss.

7.
A body of mass 4 kg moving at 12 m/s collides with another body of mass 8 kg and adheres to it. The resultant velocity of the total mass in m/s will be
4.0
5.0
6.0
7.0
Explanation:
No answer description is available. Let's discuss.

8.
A soil sample is having a specific gravity of 2.60 and a void ratio of 0.78. The water content in percentage required to fully saturate the soil at the void ratio would be
10
30
50
70
Explanation:
No answer description is available. Let's discuss.

9.
A rectangular channel carries a discharge of 5 m3/s. The channel is 2 m wide. What is the critical depth of the flow ?
1.25 m
1.07 m
0.565 m
0.86 m