Civil Engineering - UPSC Civil Service Exam Questions

11. 

The "Back sight" reading on a vertically held staff at a point A on the floor along the centre line of a railway tunnel is 3.465 m, and the "Fore sight" on the inverted staff held at the roof of the tunnel just vertically above A is 1.115 m. The height of the tunnel along the centre line at floor point A is

A. 2.310 m
B. 3.465 m
C. 4.620 m
D. 6.930 m

Answer: Option C

Explanation:

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12. 

The tipping load of a crane refers to

A. lifted weight together with all attached handling tackle and hoist rope, with grounded attached outriggers
B. lifted weight together with all attached handling tackle but excluding hoist rope, with specifying the radius horizontally, with grounded outriggers
C. lifted weight alone, with specifying the radius for the lifted weight and also for the counter weight without grounding the outriggers
D. lifted weight alone, at specified horizontal radius without grounding the outriggers.

Answer: Option B

Explanation:

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13. 

According to the theory of filtration in water treatment, which of the following mechanisms come into play when water is filtered through a filter bed ?
1. Mechanical straining
2. Capillary action
3. Centrifugal force
4. Electro kinetic phenomenon
5. Osmotic force
6. Bacteriological action
Select the correct answer using the code given below :

A. 1, 2, 4 and 6
B. 2, 3 and 5
C. 3, 4, 5 and 6
D. 1, 3, 4 and 6

Answer: Option A

Explanation:

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14. 

A ball of mass 1 kg moving with a velocity of 2 m/s collides directly with a stationary ball of mass 2 kg and comes to rest after the impact. The velocity of the second ball after impact will be

A. 0
B. 1 m/s
C. 2 m/s
D. 4 m/s

Answer: Option B

Explanation:

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15. 

Consider the following statements :
In the critical path method of construction planning free float can be
1. greater than total float
2. greater than independent float
3. equal to total float
4. less than independent float.
Of these statements :

A. 1 and 4 are correct
B. 2 and 3 are correct
C. 3 and 4 are correct
D. 1 and 2 are correct

Answer: Option C

Explanation:

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