Mechanical Engineering - Hydraulics and Fluid Mechanics

21. 

The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)

A. Cd x b2gH
B. Cd x b2g x H
C. Cd x b2g x H3/2
D. Cd x b2g x H2

Answer: Option C

Explanation:

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22. 

The discharge through a siphon spillway is

A. Cd x a2gH
B. Cd x a2g x H3/2
C. Cd x a2g x H2
D. Cd x a2g x H5/2

Answer: Option A

Explanation:

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23. 

The maximum discharge over a broad crested weir is

A. 0.384 Cd x L x H1/2
B. 0.384 Cd x L x H3/2
C. 1.71 Cd x L x H1/2
D. 1.71 Cd x L x H3/2

Answer: Option D

Explanation:

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24. 

In a venturimeter, the velocity of liquid at throat is __________ than at inlet.

A. higher
B. lower

Answer: Option A

Explanation:

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25. 

The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where RN = Reynold number)

A. 1/RN
B. 4/RN
C. 16/RN
D. 64/RN

Answer: Option C

Explanation:

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