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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as

Ogee weir
Submerged weir
Broad-crested weir
Narrow-crested weir

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Hydraulics and Fluid Mechanics in ME
If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be

Lower than the surface of liquid
Higher than the surface of liquid
Unpredictable
The same as the surface of liquid

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Hydraulics and Fluid Mechanics in ME
Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of

68.8%
49.2%
84.8%
39.2%

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Hydraulics and Fluid Mechanics in ME
One cubic metre of water weighs

100 liters
500 liters
250 liters
1000 liters

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Hydraulics and Fluid Mechanics in ME
The discharge through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.

0.95 times
0.67 times
0.81 times
0.34 times

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Hydraulics and Fluid Mechanics in ME
Two pipe systems can be said to be equivalent, when the following quantites are same

friction loss and flow
friction factor and diameter
length and diameter
flow and length

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