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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Rotameter is a device used to measure

rotation
flow
absolute pressure
velocity of fluid

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Hydraulics and Fluid Mechanics in ME
In order to measure the flow with a Venturimeter, it is installed in

Any direction and in any location
Horizontal line
Inclined line with flow upwards
Inclined line with flow downwards

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Hydraulics and Fluid Mechanics in ME
Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)

Q = π.D.bf.V
Q = π.b.Vf
Q = π.D.Vf
Q = D.b.Vf

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Hydraulics and Fluid Mechanics in ME
Units of surface tension are

it has no units
energy/unit area
both of the above
distance

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Hydraulics and Fluid Mechanics in ME
The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.

One-half
One-third
Two-third
None of these

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

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

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