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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be

Horizontal
First rise and then fall
Nearly horizontal
Steep

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Hydraulics and Fluid Mechanics in ME
The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the

Velocity head
Pressure head - velocity head
Pressure head
Pressure head + velocity head

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Hydraulics and Fluid Mechanics in ME
Francis turbine is best suited for

High head installation above 180 m
Low head installation up to 30 m
Medium head application from 24 to 180 m
All types of heads

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Hydraulics and Fluid Mechanics in ME
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.

Arithmetic mean
Difference
Geometric mean
Sum

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

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

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Hydraulics and Fluid Mechanics in ME
The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle θ with the jet is

(waV/g) × sin θ
(waV²/2g) × sin 2θ
(waV²/g) × sin θ
(waV/2g) × sin θ

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