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Fluid Mechanics

Fluid Mechanics
Cd is always __________ Cc.

Less than
Either more or less than
Greater than
Equal to

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Fluid Mechanics
The pressure drop per unit length of pipe incurred by a fluid 'X' flowing through pipe is Δp. If another fluid 'Y' having both the specific gravity & density just double of that of fluid 'X', flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be

Δp²
Δp
2Δp
Δp/2

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Fluid Mechanics
The equivalent diameter for flow through a rectangular duct of width B and height H is

4HB/(H + B)
2HB/(H + B)
HB/(H + B)
HB/2(H + B)

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

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

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Fluid Mechanics
Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics.

Gear
Sump
Positive displacement
Piston

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

Centrifugal
None of these
Axial flow
Mixed flow

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