Civil Engineering - UPSC Civil Service Exam Questions

1. 

A river is the source of water for water supply to a town. Its water is very turbid and polluted. The correct sequence of steps for treating the river water would be :

A. Presedimentation -> prechlorination -> coagulation -> sedimentation -> filtration -> post chlorination
B. coagulation -> sedimentation -> post-chlorination
C. coagulation -> filtration -> sedimentation -> post-chlorination
D. sedimentation -> post-chlorination

Answer: Option A

Explanation:

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2. 

What is the probable maximum precipitation (PMP) ?

A. Projected precipitation for a 100-yr return period
B. Maximum precipitation for all past recorded storms
C. Upper limit of rainfall, which is justified climatologically
D. Effective precipitable water

Answer: Option C

Explanation:

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3. 

Westergaard's analysis for stress distribution beneath loaded area is applicable to

A. sandy soils
B. clayey soils
C. stratified soils
D. silty soils

Answer: Option C

Explanation:

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4. 

Which of the following variations of magnetic declination are correctly matched ?
1. Diurnal variation..........Variation whose time period varies from 100-350 years
2. Annual variation.........Annual rate of change of secular variation
3. Secular variaiion..........Variation of declination periodic in character
4. Irregular variation.........Caused due to magnetic storms in earth's magnetic field
Select the correct answer using the codes given below :

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

Answer: Option D

Explanation:

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5. 

In order to find the resultant of a system of coplanar parallel system of forces, the correct sequence of the graphical procedure to be followed is

A. force diagram, space diagram, funicular polygon and polar diagram
B. funicular polygon, force diagram, space diagram and polar diagram
C. space diagram, force diagram, polar diagram and funicular polygon
D. space diagram, funicular polygon, force diagram and polar diagram.

Answer: Option C

Explanation:

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