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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For pipes, turbulent flow occurs when Reynolds number is

less than 4000
between 2000 and 4000
more than 4000
less than 2000

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Hydraulics and Fluid Mechanics in ME
One horsepower is equal to

102 watts
75 watts
735 watts
550 watts

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Hydraulics and Fluid Mechanics in ME
In a reciprocating pump, air vessels are used to

Smoothen the flow
Reduce suction head
Increase delivery head
Reduce acceleration head

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Hydraulics and Fluid Mechanics in ME
The velocity of jet of water travelling out of opening in a tank filled with water is proportional to

h2
h2
V/T
head of water (h)

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Hydraulics and Fluid Mechanics in ME
A hydraulic coupling belongs to the category of

Energy generating machines
Power developing machines
Power absorbing machines
Energy transfer machines

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Hydraulics and Fluid Mechanics in ME
When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wave), the portion of pipe length subjected to maximum head is

L/4
L/3
L/2
L

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