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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Gradually varied flow is

non-steady uniform
non-steady non-uniform
steady uniform
steady non-uniform

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Hydraulics and Fluid Mechanics in ME
The undershot water wheels are those in which

None of these
The wheel runs entirely by the weight of water
The wheel runs entirely by the impulse of water
The wheel runs partly by the weight of water and partly by the impulse of water

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Hydraulics and Fluid Mechanics in ME
The cavitation in a hydraulic machine

Causes noise and vibration of various parts
Causes sudden drop in power output and efficiency
Reduces the discharge of a turbine
All of these

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Hydraulics and Fluid Mechanics in ME
An air vessel is provided at the summit in a siphon to

Increase velocity
Avoid interruption in the flow
Increase discharge
Maintain pressure difference

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Hydraulics and Fluid Mechanics in ME
The hydraulic mean depth or the hydraulic radius is the ratio of

Wetted perimeter and diameter of pipe
Area of flow and wetted perimeter
Velocity of flow and area of flow
None of these

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Hydraulics and Fluid Mechanics in ME
Metacentric height is the distance between the metacentre and

center of gravity
water surface
center of pressure
center of buoyancy

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