Hydraulics and Fluid Mechanics - Section 1 (4)

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Hydraulics and Fluid Mechanics - Section 1

25.

Which of the following is an example of laminar flow?

A.	Under ground flow
B.	Flow past tiny bodies
C.	Flow of oil in measuring instruments
D.	all of these

Answer: Option D

Explanation:

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26.

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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27.

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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28.

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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29.

The discharge through a siphon spillway is

A.	Cd x a√2gH
B.	Cd x a√2g x H3/2
C.	Cd x a√2g x H2
D.	Cd x a√2g x H5/2

Answer: Option A

Explanation:

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30.

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 b√2gH
B.	Cd x b√2g x H
C.	Cd x b√2g x H3/2
D.	Cd x b√2g x H2

Answer: Option C

Explanation:

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31.

The discharge through a large rectangular orifice is given by (where H₁ = Height of the liquid above the top of the orifice, H₂ = Height of the liquid above the bottom of the orifice, b = Breadth of the orifice, and C_d = Coefficient of discharge)

A.	Q =Cd x b√2g(H2 - H1)
B.	Q =Cd x b√2g(H21/2 - H11/2)
C.	Q =Cd x b√2g(H23/2 - H13/2)
D.	Q =Cd x b√2g(H22 - H12)

Answer: Option C

Explanation:

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32.

In order to measure the flow with a venturimeter, it is installed in

A.	horizontal line
B.	inclined line with flow upwards
C.	inclined line with flow downwards
D.	any direction and in any location

Answer: Option D

Explanation:

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Hydraulics and Fluid Mechanics - Section 1 (4)

Hydraulics and Fluid Mechanics - Section 1

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