Civil Engineering - Hydraulics

41. 

For maximum horse power of a nozzle, the head supplied must be equal to

A. head loss in the pipe due to friction
B. twice the head loss in the pipe due to friction
C. thrice the head loss in the pipe due to friction
D. four times the head loss in the pipe due to friction.

Answer: Option C

Explanation:

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42. 

The ratio of frictional factor and coefficient of friction used in general equation for a head loss in a pipe, is

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

Answer: Option D

Explanation:

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43. 

Flow in pipes is turbulent if Reynold number is

A. less than 2100
B. more than 3000
C. between 2100 and 3000
D. none of these.

Answer: Option B

Explanation:

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44. 

Back water curve is caused if

A. friction head loss is more than the bed slope
B. pressure is due to weir in the channel
C. there is an increase in width of the channel
D. none of these.

Answer: Option B

Explanation:

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45. 

Power transmitted through a pipe is maximum when friction head loss, is

A. one-half of the total head supplied
B. one-third of the total head supplied
C. one-fouth of the total head supplied
D. equal to the total head supplied.

Answer: Option B

Explanation:

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