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Fluid Mechanics

Fluid Mechanics
Lower BWG means __________ of the tube.

Inner diameter
Outer diameter
Lower cross-section
Lower thickness

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Fluid Mechanics
In case of supersonic flow of a fluid through pipeline, the 'Mach number' is

1
> 1
< 1

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Fluid Mechanics
Foot valves are provided in the suction line of a centrifugal pump to

Avoid priming, every time we start the pump
Minimise the fluctuation in discharge
Control the liquid discharge
Remove the contaminant present in the liquid

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Fluid Mechanics
Bernoull's equation does not apply to the functioning of a/an

Orificem
Pitot tube
Venturimeter
None of these

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Fluid Mechanics
Unsteady non-uniform flow is represented by flow through a/an

Long pipe at constant rate
Expanding tube at constant rate
Long pipe at decreasing rate
Expanding tube at increasing rate

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Fluid Mechanics
Uniform fluid flow occurs, when the derivative of the flow variables satisfy the following condition.

∂/∂s = 0
∂/∂t = 0
∂/∂t = constant
∂/∂t = constant

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