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Hydraulics and Fluid Mechanics in ME

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

49.2%
39.2%
84.8%
68.8%

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Hydraulics and Fluid Mechanics in ME
The flow rate in gear pump

Increases with increase in pressure
Decreases with increase in pressure
Unpredictable
More or less remains constant with increase in pressure

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Hydraulics and Fluid Mechanics in ME
The total energy line lies over the centre line of the pipe by an amount equal to

Velocity head
Pressure head - velocity head
Pressure head
Pressure head + velocity head

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Hydraulics and Fluid Mechanics in ME
The unit of surface tension is

N/m
N-m
N/m3
N/m2

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Hydraulics and Fluid Mechanics in ME
A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm² and a volume of 0.039 m3 at 150 kg/cm². The bulk modulus of elasticity of liquid is

400 kg/cm²
40 × 10⁵ kg/cm²
4000 kg/cm²
40 × 10⁶ kg/cm²

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Hydraulics and Fluid Mechanics in ME
In an immersed body, center of pressure is

above the center of gravity
below be center of gravity
at the center of gravity
could be above or below e.g. depending on density of body and liquid

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