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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The force present in a moving liquid is

Gravity force
Viscous force
All of these
Inertia force

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Hydraulics and Fluid Mechanics in ME
The efficiency of a Pelton wheel working under constant head ________ with the increase in power.

Decreases
Increases
None of these
Remain same

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Hydraulics and Fluid Mechanics in ME
All the terms of energy in Bernoulli’s equation have dimension of

length
energy
work
mass

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Hydraulics and Fluid Mechanics in ME
For starting an axial flow pump, its delivery valve should be

Depends on starting condition and flow desired
Closed
Open
Could be either open or closed

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Hydraulics and Fluid Mechanics in ME
The surface tension of mercury at normal temperature is __________ that of water.

Higher than
Lower than
None of these
Same as

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

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