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

Could be above or below e.g. depending on density of body and liquid
Below be centre of gravity
Above the centre of gravity
At the centre of gravity

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Hydraulics and Fluid Mechanics in ME
Which of the following is an incorrect statement ?

None of these
Flow nozzle is cheaper than venturimeter but has higher energy loss
Discharge is independent of orientation of venturimeter whether it is horizontal, vertical or inclined
Coefficient of contraction of a venturimeter is unity

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Hydraulics and Fluid Mechanics in ME
In an inward flow reaction turbine

The water enters the wheel at the outer periphery and then flows towards the center of the wheel
The water enters at the center of the wheel and then flows towards the outer periphery of the wheel
The flow of water is partly radial and partly axial
The water flows parallel to the axis of the wheel

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Hydraulics and Fluid Mechanics in ME
The hammer blow in pipes occurs when

There is excessive leakage in the pipe
The flow of fluid through the pipe is suddenly brought to rest by closing of the valve
The flow of fluid through the pipe is gradually brought to rest by closing of the valve
The pipe bursts under high pressure of fluid

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