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FLUID MECHANICS

Fluid Mechanics
Delivery of insufficient quantity of liquid by a pump may be caused by

All of these
Too high a lift
Low rpm
Air leak in the inlet

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Fluid Mechanics
Design of the casing of centrifugal pump should be such as to minimise the

Loss of static head
Back flow through impeller
Loss of kinetic head
None of these

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Fluid Mechanics
A lubricant 100 times more viscous than water would have a viscosity (in Pa.s)

10
1
0.01
0.1

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Fluid Mechanics
Pressure gradient in the pipe flow is influenced by the

Density & viscosity of the fluid
Diameter of pipe
All of these
Velocity of the fluid

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Fluid Mechanics
In case of supersonic flow of a fluid through pipeline, the 'Mach number' is

1
> 1
< 1

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