Civil Engineering - GATE Exam Questions

31. 

A borrow pit soil has a dry density of 17 kN/m3. How many cubic meters of this soil will be required to construct an embankment of 100 m3 volume with a dry density of 16 kN/m3.

A. 94 m3
B. 106 m3
C. 100 m3
D. 90 m3

Answer: Option A

Explanation:

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32. 

The ultimate bearing capacity of a soil is 300 kN/m2. The depth of foundation is 1 m and unit weight of soil is 20 kN/m3. Choosing a factor of safety of 2.5, the net safe bearing cacpacity is

A. 100 kN/m2
B. 112 kN/m2
C. 800 kN/m2
D. 100.5 kN/m2

Answer: Option D

Explanation:

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33. 

One of the following statements is true with regards to bodies that float or are submerged in liquids :

A. For a body wholly submerged in a liquid the stability is ensured if the centre of buoyancy is below the centre of gravity of the body
B. For a body floating in a liquid the stability is ensured if the centre of buoyancy is below the centre of gravity of the body
C. For a body floating in a liquid the stability is ensured if the centre of buoyancy and the centre of gravity, regardless of the relative positions of the centre of buoyancy and gravity
D. For a body floating in a liquid the stability is ensured if the centre of buoyancy is below the centre of gravity and the metacentre is above both the centres of gravity and buoyancy.

Answer: Option D

Explanation:

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34. 

Transition curves are provided on the approach to horizontal curves in order to :

A. increase jerk to allowable levels
B. minimize the length of the horizontal curve
C. simplify the laying-out and construction of the horizontal curve
D. reduce jerk to allowable levels

Answer: Option D

Explanation:

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35. 

The flow of water (mass density = 1000 kg/m3 and kinematic viscosity = 10-6 m2/s) in a commercial pipe, having equivalent roughness ks as 0.12 mm, yields an average shear stress at the pipe boundary = 600 N/m2. The value of ks/δ' (δ' being the thickness of laminar sub-layer) for this pipe is

A. 0.25
B. 0.50
C. 6.0
D. 8.0

Answer: Option D

Explanation:

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