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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Metacentric height is the distance between the metacentre and

center of buoyancy
center of gravity
center of pressure
water surface

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Hydraulics and Fluid Mechanics in ME
According to fan laws, at constant pressure, the speed capacity and power vary

As square of density
Inversely as density
Inversely as square root of density
Directly as the air or gas density

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Hydraulics and Fluid Mechanics in ME
Which type of the pump is different from others in the same group?

Gear pump
Plunger pump
Cam and piston pump
Screw pump

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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

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

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Hydraulics and Fluid Mechanics in ME
The absolute pressure is equal to

Gauge pressure + atmospheric pressure
Atmospheric pressure - gauge pressure
Gauge pressure - vacuum pressure
Gauge pressure - atmospheric pressure

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Hydraulics and Fluid Mechanics in ME
In a free nappe,

The pressure below the nappe is atmospheric
The pressure below the nappe is negative
The pressure above the nappe is atmospheric
The pressure above the nappe is negative

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