Civil Engineering - UPSC Civil Service Exam Questions

26. 

When two roads with two-lane, two-way traffic, cross at an uncontrolled intersection, the total number of potentional major conflict points would be

A. 32
B. 24
C. 16
D. 4

Answer: Option B

Explanation:

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27. 

If the load, warping and frictional stresses in a cement concrete slab are 210 N/mm2, 290 N/mm2 and 10 N/mm2 respectively, the critical combination of stresses during summer midday is

A. 290 N/mm2
B. 390 N/mm2
C. 490 N/mm2
D. 590 N/mm2

Answer: Option C

Explanation:

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28. 

From a circular plate of diameter D, whose centre is C, another circular plate of diameter AC is cut, removed and kept over CB (in the given figure). The thickness of the plate is uniform. The shift of the centroid due to this operation will be

A. D/4 to the left of C
B. D/8 to the right of C
C. D/4 to the right of C
D. 3D/8 to the right of C

Answer: Option B

Explanation:

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29. 

Consider the following statements :
1. Infiltration galleries are placed along the river beds at a depth of 4 to 6 m.
2. The draw-down for the infiltration galleries is more than that for radial wells.
3. Clogging of pipe pores in inflitration galleries is less than that for radial wells.
4. The cost of extracting unit volume of water is more in case of infiltration galleries as compared to radial wells.
Which of the statements given above is/are correct ?

A. 1 and 2
B. 1, 2 and 3
C. 2, 3 and 4
D. 4 only

Answer: Option C

Explanation:

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30. 

What is the actual ground area covered by a 20 cm x 20 cm size vertical aerial photograph, at an average scale of 1 cm = 200 m having 60% forward overlap and 30% side overlap ?

A. 1.92 km2
B. 4.48 km2
C. 6.72 km2
D. 2.88 km2

Answer: Option B

Explanation:

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