Mechanical Engineering - Hydraulics and Fluid Mechanics

16. 

The velocity corresponding to Reynold number of 2000 is called

A. sub-sonic velocity
B. super-sonic velocity
C. lower critical velocity
D. higher critical velocity

Answer: Option C

Explanation:

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17. 

The specific weight of water in S.I. units is taken as

A. 9.81 kN/m3
B. 9.81 x 103 kN/m3
C. 9.81 x 10-6 N/mm3
D. any one of these

Answer: Option A

Explanation:

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18. 

The loss of head at exit of a pipe is

A.
B.
C.
D.

Answer: Option A

Explanation:

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19. 

The flow in a pipe is laminar, when Reynold number is less than 2000.

A. True
B. False

Answer: Option A

Explanation:

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20. 

The power transmitted through the pipe is maximum when the head lost due to friction is equal to

A. one-fourth of the total supply head
B. one-third of the total supply head
C. one-half of the total supply head
D. two-third of the total supply head

Answer: Option B

Explanation:

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