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Fluid Mechanics

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

Euler
Mach
Weber
Froude

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Fluid Mechanics
What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water iterface? The balloon is of radius 0.1 m and is filled with air.

0.01πgH/4
0.04πgH/3
4πg/3
0.01πgH/8

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Fluid Mechanics
Water flow rate in a pipe of 3.5 metres diameter can be most economically and conveniently measured by a/an

Pitot tube
Orificemeter
Venturimeter
Rotameter

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Fluid Mechanics
Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the __________ decreases.

NPSH required
All of these
Head of the liquid pumped
BHP required by the pump

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Fluid Mechanics
Transition from laminar flow to turbulent flow is aided by the

Surface roughness and curvature (i.e.sharp corners)
Pressure gradient and the compressibility of the flowing medium
Vibration
All of these

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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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MORE MCQ ON Fluid Mechanics

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