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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The optimum value of vane exit angle for a centrifugal pump impeller is

50-60°
20-25°
10-15°
30-40°

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Hydraulics and Fluid Mechanics in ME
The Newton's law of resistance is based on the assumption that the

Space around the body is completely filled with the fluid
Planes of the body are completely smooth
Fluid particles do not exert any influence on one another
All of these

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Hydraulics and Fluid Mechanics in ME
Motion of a liquid in a volute casing of a centrifugal pump is an example of

Spiral vortex flow
Forced spiral vortex flow
Radial
Rotational flow

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Hydraulics and Fluid Mechanics in ME
The Reynold's number of a ship is __________ to its velocity and length.

Directly proportional
None of these
Inversely proportional
Square root of velocity

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Hydraulics and Fluid Mechanics in ME
The pressure less than atmospheric pressure is known as

Vacuum pressure
All of the listed here
Suction pressure
Negative gauge pressure

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Hydraulics and Fluid Mechanics in ME
If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will

tend to move downward and it may finally sink
None of these
rise until its weight equals the buoyant force
float

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