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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Units of surface tension are

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

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Hydraulics and Fluid Mechanics in ME
Braking jet in an impulse turbine is used

To break the jet of water
To bring the runner to rest in a short time
To change the direction of runner
None of these

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Hydraulics and Fluid Mechanics in ME
A hydraulic accumulator normally consists of

A cylinder, a piston, storage tank and control valve
Two coaxial rams and two cylinders
Two cylinders, two rams and a storage device
A cylinder and a ram

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Hydraulics and Fluid Mechanics in ME
Practical fluids

possess all the above properties
possess surface tension
are viscous
are compressible

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Hydraulics and Fluid Mechanics in ME
The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

Delivers unit discharge under unit head
Delivers unit discharge under unit speed
Develops unit power under unit head
Develops unit power under unit speed

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Hydraulics and Fluid Mechanics in ME
In a centrifugal pump, the regulating valve is provided on the

Suction pipe
Delivery pipe
Impeller
Casing

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