Civil Engineering - Hydraulics

21. 

The instrument used for measuring the velocity of flow, is known as

A. venturimeter
B. orifice meter
C. pitot tube
D. none of these.

Answer: Option C

Explanation:

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22. 

For a long pipe, the head loss

A. at the entrance is ignored
B. at the outlet is ignored
C. at the entrance and outlet both are ignored
D. due to friction is ignored.

Answer: Option C

Explanation:

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23. 

On a flow net diagram, the distance between two consecutive steam lines at two successive sections are 1 cm and 0.5 cm respectively. If the velocity at the first section is 1 m/sec, the velocity at the second is

A. 1.0 m/sec
B. 0.5 m/sec
C. 2.0 m/sec
D. 2.5 m/sec
E. 3 m/sec.

Answer: Option C

Explanation:

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24. 

If L, D and f are the length, diameter and coefficient of friction of a pipe, the ratio of the areas of the pipe A and nozzle a, to transmit maximum power, is

A.
B.
C.
D.

Answer: Option D

Explanation:

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25. 

The flow is called rotational if its velocity normal to the plane of area is equal to

A. angular velocity vector
B. twice the angular velocity vector
C. thrice the angular velocity vector
D. none of these.

Answer: Option B

Explanation:

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