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Fluid Mechanics

Fluid Mechanics
Volume of liquid displaced by a floating body is equivalent to its

Submerged weight
Own weight
Own volume
Submerged volume

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Fluid Mechanics
Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will

Increase
Decrease
Remain same
Data insufficient to predict pressure drop

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Fluid Mechanics
High specific speed of a pump implies that, it is a/an __________ pump.

Mixed flow
None of these
Axial flow
Centrifugal

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Fluid Mechanics
As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re << 1

None of these
Decreases as V²
Increases linearly with V
Decreases linearly with V

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Fluid Mechanics
For an incompressible fluid, the bulk modulus of elasticity is

∞ N/m²
0 N/m
1 N
5 kg/m³

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Fluid Mechanics
Priming of a centrifugal pump is done to

None of these
Increase the mass flow rate of fluid
Develop effective pressure rise by the pump
Avoid chances of separation inside the impeller

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