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Fluid Mechanics

Fluid Mechanics
What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate?

1
2
1.5
0.5

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Fluid Mechanics
Delivery of insufficient quantity of liquid by a pump may be caused by

Too high a lift
All of these
Air leak in the inlet
Low rpm

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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
Positive displacement
Piston
Sump

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Fluid Mechanics
The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is

< 1
1
2
> 1

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Fluid Mechanics
The inherent characteristic of an equal percentage valve relating flow rate 'q' with valve stem movement 'x' are described by the equation

dq/dx = K.q
dq/dx = K
dq/dx = Kq²
dq/dx = K/q

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Fluid Mechanics
Which of the following is the most common pump for pumping either raw sewage or sludge?

Electromagnetic pump
Reciprocating pump
Centrifugal pump
Gear pump

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MORE MCQ ON Fluid Mechanics

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