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Fluid Mechanics

Fluid Mechanics
In Newton's law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is

0.044
4.4
44
0.44

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Fluid Mechanics
The unit of bulk modulus of elasticity for a liquid in S.I. unit is

N/m
N/m²
N/m³
N

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Fluid Mechanics
Steady uniform flow is represented by flow through a/an

Long pipe at decreasing rate
Expanding tube at constant rate
Long pipe at constant rate
None of these

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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

Decrease
Data insufficient to predict pressure drop
Increase
Remain same

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Fluid Mechanics
Net positive suction head (NPSH) of a centrifugal pump must be

Greater than the vapour pressure of the liquid
Equal to the vapour pressure of the liquid
Less than the vapour pressure of the liquid
Less than barometric pressure

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Fluid Mechanics
The normal stress is the same in all directions at a point in a fluid, when the fluid is

Having no motion of one fluid layer relative to the other
Non-viscous
Both A and B
Incompressible

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