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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The overall efficiency for a Pelton wheel lies between

0.75 to 0.85
0.65 to 0.75
0.85 to 0.90
0.50 to 0.65

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Hydraulics and Fluid Mechanics in ME
The meatcentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is

4.1 sec
5.2 sec
10.4 sec
14.1 sec

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Hydraulics and Fluid Mechanics in ME
If the depth of water in an open channel is less than the critical depth, the flow is called

Tranquil flow
Torrential flow
Turbulent flow
Critical flow

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Hydraulics and Fluid Mechanics in ME
If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge

1.5 Q
Same quantity of liquid
0.75 Q
Q/0.75

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Hydraulics and Fluid Mechanics in ME
The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)

H × √(2g)
√(2gh)
2g × √H
2gH

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Hydraulics and Fluid Mechanics in ME
Barometer is used to measure

Difference of pressure between two points
Very low pressure
Pressure in pipes, channels etc.
Atmospheric pressure

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