# Civil Engineering - UPSC Civil Service Exam Questions

21.

If the stream function ψ = 3x2 - y3, what is the magnitude of velocity at point (2, 2) ?

 A. 9 B. 13 C. 15 D. 17

Explanation:

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22.

In each of the following examples certain quantity of work 'W' is done.
1. The point of application of a force of (50i + 60j + 80k) in kN units moves through a distance given by (6i + 5j + 2.5k) in metres.
2. A pump raises 2m3 of water through a height of 20 m (Take g = 10 m/s2).
3. A shaft delivering a torque = 200 kNm makes 0.75 revolution.
4. A couple (30i - 20j + 100k) in kNm units acting on a body rotates it through an angular displacement of (2i + 3j + 6k) radians.
The correct sequence of these quantities of work 'W' arranged in order of their increasing magnitude is

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

Explanation:

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23.

Which one of the following characteristics of ballast makes it unsuitable for use ?

 A. High resilience B. High stability C. High water absorption D. High modulus

Explanation:

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24.

In the propped cantilever shown in the figure below, what are the values of the bending moment and shear force at the support A ?

 A. 2 Pa, P/3 B. Pa, P C. Pa, P/3 D. 2 Pa, 4 P/3

Explanation:

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25.

Which one of the following methods of O-D traffic surveys is conducted for comprehensive analysis of traffic and transportation data ?

 A. Home interview B. Roadside interview C. Registration number method D. Postcard method