Fluid Mechanics
Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the

Pipe length
Fluid velocity in the pipe
All of these
Time taken to close the valve

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Fluid Mechanics
The continuity equation

Stipulates that Newton's second law of motion must be satisfied at every point in the fluid
Relates mass flow rate along a stream tube
None of these
Relates work and energy

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Fluid Mechanics
Vane anemometer

Is an area meter
Is a variable head meter
Rotates an element at a speed determined by the velocity of the fluid in which the meter is immersed
None of these

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