Civil Engineering - Water Supply Engineering

46. 

A water channel supported above the ground over trestles, is generally called

A. flume
B. canal
C. adueduct
D. tunnel
E. all the above.

Answer: Option A

Explanation:

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47. 

If d is the diameter of the pipe, p is the total internal pressure, f is the permissible tensile stress and n is the effective of the joint, the thickness t of metal pipe, is

A.
B.
C.
D.
E. none of these.

Answer: Option B

Explanation:

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48. 

One degree of hardness of water means a content of salts of

A. 10.25 mg/litre
B. 12.25 mg/litre
C. 14.25 mg/litre
D. 16.25 mg/litre.
E. 20 mg/litre.

Answer: Option C

Explanation:

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49. 

Mostly used coagulant, is

A. chlorine
B. alum
C. lime
D. bleaching powder.

Answer: Option B

Explanation:

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50. 

If G is the specific gravity of particles of diameter d, the velocity of settlement V in still water at T°C, according to Stoke's law, is

A.
B.
C.
D.
E. none of these.

Answer: Option A

Explanation:

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