# 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

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'

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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

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

Explanation:

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5.

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