# Civil Engineering - UPSC Civil Service Exam Questions

6.

Given that,
t = thickness of the plates,
b = width of the plates,
d = diameter of the rivets,
n = number of rivets in a line,
σt = permissible tensile stress.
The tearing strength of the joint is given by

 A. t(b - nd)σt B. t(b + nd)σt C. (bt - nd/t)σt D. (bt - nd/t)σt

Explanation:

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7.

Consider the following statements pertaining to a pile group and a single pile at failure :
1. In loose and medium dense sands, the failure load per pile in a group will generally be greater than the failure load for a single pile.
2. In cohesive soils, the failure load per pile in a group will be greater than failure load for a single pile.
3. For piles driven in dense sands, the failure load per pile in a group is greater than the failure load for a single pile.
4. When the pile spacing is greater than 10 times the pile diameter, the failure loads per pile in a group and forly same in both sands and clays.
Of these statements :

 A. 1 and 4 are correct B. 2 and 4 are correct C. 1, 2, 3 and 4 are correct D. 2, 3 and 4 are correct

Explanation:

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8.

A surge tank is provided in a hydropower scheme to

 A. provide additional storage close to the penstock B. take care of change of slope, alignment or size of the water conductor system C. reduce the pressures under transient conditions D. provide convenient overspills

Explanation:

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9.

If the settlement of a single pile in sand is denoted by S and that of a group of N identical piles (each pile carrying the same load) by Sg, then the ratio Sg/S will

 A. be equal to 1 irrespective of width of the group B. be equal to N irrespective of width of the group C. decrease as the width of the group increases D. increase as the width of the group increases

Explanation:

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10.

For the analysis of flow in a water distribution network, the site engineers prefer the following head loss equation :

 A. Darcy-Weisbach equation B. Chezy's equation C. Hazen-William's equation D. Manning's equation