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FLUID MECHANICS

Fluid Mechanics
The bulk modulus of elasticity of a liquid

Increases with pressure
Is zero for incompressible liquid
Is independent of temperature & pressure
Decreases with pressure

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Fluid Mechanics
For the transfer of solution of thick slurry, the pump used is a __________ pump.

Reciprocating
Centrifugal
Gear
Diaphragm

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Fluid Mechanics
Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the __________ decreases.

BHP required by the pump
Head of the liquid pumped
All of these
NPSH required

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Fluid Mechanics
In laminar flow through a round tube, the discharge varies

Linearly as the viscosity
Inversely as the viscosity
As the square of the radius
Inversely as the pressure drop

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Fluid Mechanics
What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate?

1.5
1
0.5
2

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