Civil Engineering - UPSC Civil Service Exam Questions

16. 

Which one of the following different types of submerged soils is susceptible to liquefaction under earthquake shocks ?

A. Dense sand
B. Soft clay
C. Loose silt
D. Fissured clay

Answer: Option C

Explanation:

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17. 

In the given figure, σ1 and the σ2 and maximum and minimum principal stresses. In order that the resultant stress on the plane AB is the value of θ should be

A. 30°
B. 45°
C. 60°
D. 75°

Answer: Option B

Explanation:

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18. 

Eutrophication of water bodies is caused by the

A. discharge of toxic substances
B. excessive discharge of nutrients
C. excessive discharge of suspended solids
D. excessive discharge of chlorides

Answer: Option B

Explanation:

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19. 

For laminar flow through a circular tube, the average velocity at a section is

A. the same as that at the centre of tube
B. two-thirds the velocity at the centre of the tube
C. half the velocity at the centre of the tube
D. dependent on the pressure at the section

Answer: Option C

Explanation:

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20. 

In the figure shows, the effective pressure at C is given by (symbols have the usual meanings)

A. (h + z) yw
B. zyw
C. zySub
D. hyw + zysat

Answer: Option C

Explanation:

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