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Fluid Mechanics

Fluid Mechanics
Lower BWG means __________ of the tube.

Inner diameter
Lower cross-section
Outer diameter
Lower thickness

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Fluid Mechanics
Euler's equation of motion is a statement expressing

Conservation of mass
Conservation of energy
Newton's second law of motion
Newton's first law of motion

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Fluid Mechanics
The temperature in isentropic flow

Cannot drop and then increase again downstream
Depends on Mach number only
Does not depend on Mach number
None of these

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Fluid Mechanics
The ratio of inertial forces to viscous forces is called the __________ number.

Mach
Reynold
Froude
Weber

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Fluid Mechanics
The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet.

P, Q and R
P, Rand S
P and R
R and S

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Fluid Mechanics
The hydraulic radius for flow in a rectangular duct of cross-sectional dimension H, W is

√(HW/π)
2HW/(H + W)²
HW/4(H + W)²
HW/2(H + W)²

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