Civil Engineering - UPSC Civil Service Exam Questions

36. 

A footing is resting on a fully saturated clayey strata. For checking the initial stability, shear parameters are used from which one of the following ?

A. Consolidated non-drained test
B. Unconsolidated drained test
C. Unconsolidated non-drained test
D. Unconsolidated non-drained test with pore pressure measurement

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

37. 

Consider the following factors :
1. Reaction time
2. Speed
3. Coefficient of longitudinal friction
4. Gradient
Which of these factors are taken into account for computing braking distance ?

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

Answer: Option C

Explanation:

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38. 

For the purpose of designing a well point system for lowering ground water table in a sandy silt deposit, the coefficient of permeability of the soil is to be determined. Which one of the following methods would be most suitable ?

A. Constant Head Permeameter Test
B. Variable Head Permeameter Test
C. Pumping out Test in the field
D. Pumping in Test in the field

Answer: Option C

Explanation:

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39. 

Which of the following are associated with alum coagulation ?
1. A decrease of alkalinity in treated water
2. Formation of hydroxide flocs of aluminium
3. A slight decrease of pH in treated water
4. An increase of permanent hardness
Select the correct answer using the codes given below :

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

Answer: Option C

Explanation:

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40. 

Consider the following statements :
For an over-reinforced (singly reinforced) rectangular RC section.
1. the lever arm will be less than that for a balanced section.
2. the maximum stress developed by steel would equal the allowable stress in steel.
3. the maximum stress developed by concrete would equal allowable stress in concrete.
Of these statements :

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

Answer: Option A

Explanation:

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