Civil Engineering - UPSC Civil Service Exam Questions

36. 

Guide banks are provided to

A. train the flow of a river along a specified course
B. reduce the peak flood discharge
C. confine the width of river
D. increase the water way

Answer: Option A

Explanation:

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37. 

A soil fails under an axial vertical stress of 100 kN/m2 in unconfined compression test. The failure plane makes an angle of 50° with the horizontal. The shear parameters c and φ respectively will be

A. 41.9 kN/m2, 0
B. 50.0 kN/m2, 0
C. 41.9 kN/m2, 10°
D. 50.0 kN/m2, 10°

Answer: Option C

Explanation:

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38. 

The fix of a plane table from three known points is good if

A. the middle station is the nearest
B. the middle station is farther than the other two stations
C. either of the extreme stations is the nearest
D. the middle station is close to the great circle

Answer: Option B

Explanation:

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39. 

A hollow steel shaft of external diameter 100 mm and internal diameter 50 mm is to be replaced by a solid alloy shaft. Assuming the same value of polar modulus for both, the diameter of the solid alloy shaft will be

A. 10 x 39375 mm
B. 10 x 39375 x 10 mm
C.
D. 39375 mm

Answer: Option C

Explanation:

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40. 

For a circular curve of radius 200 m, the coefficient of lateral friction of 0.15 and the design speed is 40 kmph. The equilibrium superelevation (for equal pressure on inner and outer wheel) would be

A. 21.3
B. 7
C. 6.3
D. 4.6

Answer: Option C

Explanation:

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