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

A. 202.75 m
B. 206.75 m
C. 208.75 m
D. 211.75 m

Answer: Option B

Explanation:

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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

A. 4.0
B. 5.0
C. 6.0
D. 7.0

Answer: Option A

Explanation:

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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

A. 10
B. 30
C. 50
D. 70

Answer: Option B

Explanation:

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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 ?

A. 1.25 m
B. 1.07 m
C. 0.565 m
D. 0.86 m

Answer: Option D

Explanation:

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10. 

The discharge per unit drawdown at the well is known as :

A. Specific yield
B. Specific storage
C. Specific retention
D. Specific capacity

Answer: Option D

Explanation:

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