# Civil Engineering - UPSC Civil Service Exam Questions

46.

A jet of water issues from a 5 cm diameter nozzle, held vertically upwards, at a velocity of 20 m/sec. If air resistance consumers 10% of the initial energy of the jet, then it would reach a height, above the nozzle, of

 A. 18.35 m B. 19.14 m C. 19.92 m D. 20.00 m

Explanation:

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47.

A given material has Young's modulus E, modulus of rigidity G and Poisson's ratio of Young's modulus to modulus of rigidity of this material is,

 A. 3.75 B. 3 C. 2.5 D. 1.5

Explanation:

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48.

The force in the member BD of the truss shown in the given figure is A. 4 kN tensile B. 4 kN compressive C. zero D. 12 kN compressive

Explanation:

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49.

Which of the following instruments have both horizon glass and index glass ?
1. Optical square
2. Line ranger
3. Box sextant
4. Pedometer
Select the correct answer using the code given below :

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

Explanation:

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50.

Which of the following equations are used for the derivation of the differential equation for water surface profile in open channel flow :
1. Continuity equation
2. Energy equation
3. Momentum equation
Select the correct answer using the codes given below :

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