Civil Engineering - UPSC Civil Service Exam Questions

1. 

Which one of the following closely represents the shape of the earth?

A. Spheroid
B. Ellipsoid
C. Oblate spheroid
D. Prolate spheroid

Answer: Option B

Explanation:

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2. 

In an old map, line PQ was drawn to a magnetic bearing of 6°32', the magnetic declination at that time being 1° East. The present magnetic declination is 9°42' East. The magnetic bearing to which the line is set at present is

A. 357° 50'
B. 356° 50'
C. 3° 10'
D. 2° 10'

Answer: Option A

Explanation:

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3. 

Based on the Gaussian law of distribution of random errors, the number of errors that are expected to exceed the limit of ± a, where 0 represents the standard deviation, out of 1000 observations is

A. 317
B. 46
C. 30
D. 3

Answer: Option A

Explanation:

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4. 

In a trigonometric levelling, the height of the signal used is 4.62 m and the instrument height is 1.25 m. If the horizontal distance of the target from the instrument is 5780 m, then the axis-signal correction is

A. seconds
B. seconds
C. seconds
D. seconds

Answer: Option D

Explanation:

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5. 

The rotation of a rigid body is governed by What is its angular velocity at t - 2s ?

A. 18 rad/s
B. π/4 rad /s
C. π/8 rad /s
D. zero.

Answer: Option B

Explanation:

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