Civil Engineering - UPSC Civil Service Exam Questions

26. 

What is the predominating coagulation mechanism for raw water having high turbidity and high alkalinity?

A. Ionic layer compression
B. Adsorption and charge neutralization
C. Sweep coagulation
D. Inter particle bridging

Answer: Option C

Explanation:

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27. 

The momentum correction factor (β) is used to account for

A. change in the direction of flow
B. change in total energy
C. change in mass rate of flow
D. non-uniform distribution of vel-ocities

Answer: Option D

Explanation:

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28. 

Where is d'Alembert's principle employed ?

A. In the design of long columns
B. To determine stresses induced in thick cylinders
C. To reduce a problem of kinetics to an equivalent problem of statics
D. In the analysis of many geotechnical problems

Answer: Option C

Explanation:

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29. 

The hoop stress in a dome subjected to uniformly distributed load

A. is always compressive
B. is tensile at sections whose radius vectors are at angles less than 51°51' with the vertical
C. is tensile at sections whose radius vectors are at angles greater than 51°51' with the vertical
D. is always tensile

Answer: Option B

Explanation:

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30. 

A commonly used handpump is the

A. centrifugal pump
B. reciprocating pump
C. rotary pump
D. axial flow pump

Answer: Option B

Explanation:

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