Civil Engineering - UPSC Civil Service Exam Questions

16. 

A clay sample has a void ratio of 0.50 in dry state and specific gravity of solids = 2.70. Its shrinkage limit will be

A. 12%
B. 13.5%
C. 18.5%
D. 22%

Answer: Option C

Explanation:


17. 

A catchment has an area of 150 hectares and a run-off/rainfall ratio of 0.40. If due to 10 cm rainfall over the catchment, a stream flow at the catchment outlet lasts for 10 hours, what is the average stream flow in the period ?

A. 60, 000 m3/hour
B. 100 m3/minute
C. 3.5 m3/s
D. 1.33 m3/s

Answer: Option B

Explanation:

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18. 

The head loss in a pipe of diameter d, carrying oil at a flow rate Q over a distance l is h. The pipe is replaced by another with half the diameter, all other things remaining the same. The head loss in this case will be

A. 0.5 h
B. 2.0 h
C. 8.0 h
D. 32.0 h

Answer: Option D

Explanation:

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19. 

A very tiny sphere is settling down in a viscous liquid at Reynolds number = 0.2. Its drag coefficient is equal to

A. 320
B. 120
C. 80
D. 5

Answer: Option B

Explanation:

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20. 

An ascending gradient of 1 in 100 meets a descending gradient of 1 in 50, The length of summit curve required to provide overtaking sight distance of 500 m will be

A. 938 m
B. 781m
C. 470 m
D. 170 m

Answer: Option B

Explanation:

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