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

Answer: Option A

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

Answer: Option C

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

Answer: Option B

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

Answer: Option C

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

Answer: Option A

Explanation:

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