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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies

Square root of fan speed
Square of fan speed
Directly as fan speed
Cube of fan speed

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Hydraulics and Fluid Mechanics in ME
An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of

1.2
1
0.8
0.75

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Hydraulics and Fluid Mechanics in ME
The discharge through a channel of rectangular section will be maximum, if

Its depth is thrice the breadth
Its depth is twice the breadth
Its breadth is twice the depth
Its breadth is thrice the depth

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Hydraulics and Fluid Mechanics in ME
The ratio of the normal force of jet of water on a plate inclined at an angle of 30° as compared to that when the plate is normal to jet, is

43832
1
√2
1/√2

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Hydraulics and Fluid Mechanics in ME
Froude's number is the ratio of inertia force to

Gravity force
Surface tension force
Pressure force
Elastic force

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Hydraulics and Fluid Mechanics in ME
Units of surface tension are

both of the above
it has no units
distance
energy/unit area

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