Civil Engineering - UPSC Civil Service Exam Questions

26. 

The distribution system configuration shown in the following figure is called

A. dead end system
B. grid iron system
C. radial system
D. ring system

Answer: Option A

Explanation:

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27. 

The phenomenon of reflection cracking is observed in which of the following ?

A. Bituminous overlays provided over cracked cement concrete pavements
B. Cement concrete overlays provided over cracked bituminous pavements.
C. Bituminous overlays constructed in cold weather
D. Cement concrete overlays provided over cement concrete pavements.

Answer: Option A

Explanation:

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28. 

What are the gases produced by landfills primarily comprised of?

A. Carbon monoxide and hydrogen sulphide.
B. Methane and carbondioxide
C. Sulphur dioxide and nitrogendioxide
D. Ethane and oxygen.

Answer: Option B

Explanation:

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29. 

Consider the following statements regarding specific energy of flow in an open channel :
1. There is only one specific energy curve for a given channel.
2. Alternate depths are the depths of flow at which the specific energy is the same.
3. Critical flow occurs when the specific energy is minimum.
Of these statements :

A. 1 and 2 are correct
B. 1 and 3 are correct
C. 2 and 3 are correct
D. 1, 2 and 3 are correct

Answer: Option D

Explanation:

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30. 

A motor shaft rotating with a speed of 90 rpm decelerates uniformly when the motor is switched off and stops in 40 sec. The number of revolutions made by the shaft in this time would be

A. 10
B. 20
C. 30
D. 40

Answer: Option C

Explanation:

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