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Fluid Mechanics

Fluid Mechanics
Which of the following produces maximum pressure difference for transportation of gases?

Vaccum pumps
Fans
Compressors
Blowers

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Fluid Mechanics
Cavitation in a centrifugal pump results from

High discharge pressure
High discharge rate
Low barometric pressure
High discharge velocity

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Fluid Mechanics
The simple pitot tube measures the __________ pressure.

None of these
Dynamic
Static
Total

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Fluid Mechanics
While starting a centrifugal pump, its delivery valve should be kept

Either opened or closed; depending on the fluid viscosity
Either opened or closed ; it does not make any difference
Closed
Opened

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Fluid Mechanics
Prandtl mixing length is

None of these
Applicable to laminar flow problems
Zero at the pipe wall
A universal constant

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Fluid Mechanics
Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.

Specific gravity
Electrical resistivity
Thermal conductivity
Electrical conductivity

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