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Fluid Mechanics

Fluid Mechanics
Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head.

Static
Friction
Manometric
Total

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Fluid Mechanics
Pressure drag does not depend upon the

Pressure of main flow only
All of these
Roughness of surface of the body
Length of the body in flow direction

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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
None of these
Loss of kinetic head

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Fluid Mechanics
The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10⁻⁶m²/s).

0.24
24000
24
0.44

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Fluid Mechanics
Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the

Temperature
Neither A nor B
Both A & B
Pressure

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Fluid Mechanics
The ratio of actual discharge to theoretical discharge through an orifice is equal to

Cv . Cd
Cc . Cv
Cd/Cv
Cc . Cd

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