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Fluid Mechanics

Fluid Mechanics
Rise of liquid in a capillary tube is due to

Adhesion
Cohesion
Both A & B
Neither A nor B

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Fluid Mechanics
What is the value of Fanning friction factor f ' for smooth pipe at NRe = 10⁶ approximately?

0.003
0.1
0.01
0.3

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

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

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Fluid Mechanics
Choose the set of pressure intensities that are equivalent.

10 psi, 19.7 ft. of water, 5.3 inches of Hg
10 psi, 19.7 ft. of water, 23.3 inches of Hg
4.33 psi, 10 ft. of water, 8.83 inches of Hg
4.33 psi, 10 ft. of water, 20.7 inches of Hg

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

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

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Fluid Mechanics
Two dimensional stream function

None of these
Is constant along a stream line
Relates velocity and pressure
Is constant along an equipotential surface

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MORE MCQ ON Fluid Mechanics

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