# Mechanical Engineering - Hydraulics and Fluid Mechanics

### Exercise :: Hydraulics and Fluid Mechanics - Section 5

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

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

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

Explanation:

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29.

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

 A. True B. False

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