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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Barometer is used to measure

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

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Hydraulics and Fluid Mechanics in ME
According to Bazin's formula, the discharge over a rectangular weir is mL2g x H3/2 where m is equal to

0.405 + (H/0.003)
0.405 + (0.003/H)
0.003 + (H/0.405)
0.003 + (0.405/H)

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Hydraulics and Fluid Mechanics in ME
The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

Volumetric efficiency
Overall efficiency
Mechanical efficiency
Manometric efficiency

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Hydraulics and Fluid Mechanics in ME
For pipes, laminar flow occurs when Roynolds number is

more than 4000
between 2000 and 4000
less than 4000
less than 2000

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Hydraulics and Fluid Mechanics in ME
The ratio of actual work available at the turbine to the energy imparted to the wheel is known as ________ efficiency.

Mechanical
Hydraulic
Overall
None of these

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Hydraulics and Fluid Mechanics in ME
The efficiency of power transmission through pipe is (where H = Total supply head, and hf = Head lost due to friction in the pipe)

H/(H + hf )
(H + hf )/H
H/(H - hf )
(H - hf )/H

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