Mechanical Engineering - Hydraulics and Fluid Mechanics

26. 

A manometer is used to measure

A. atmospneric pressure
B. pressure in pipes and channels
C. pressure in venturimeter
D. difference of pressures between two points in a pipe

Answer: Option B

Explanation:

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27. 

The product of mass and accelaration of flowing liquid is called

A. inertia force
B. viscous force
C. gravity force
D. pressure force

Answer: Option A

Explanation:

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28. 

The discharge through a wholly drowned orifice is given by (where H1 = Height of water (on the upstream side) above the top of the orifice, H2 = Height of water (on the downstream side) above the bottom of the orifice, and H = Difference between two water levels on either side of the orifice)

A. Q = Cd x bH1 2gh
B. Q = Cd x bH2 2gh
C. Q = Cd x b ( H2 - H1 ) 2gh
D. Q = Cd x bH 2gh

Answer: Option C

Explanation:

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29. 

If the value of coefficient of discharge increases, the discharge through the orifice decreases.

A. True
B. False

Answer: Option B

Explanation:

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30. 

A point, in a compressible flow where the velocity of fluid is zero, is called

A. critical point
B. vena contracta
C. stagnation point
D. none of these

Answer: Option C

Explanation:

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