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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.

None of these
Less than
Equal to
More than

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Hydraulics and Fluid Mechanics in ME
In a reciprocating pump, air vessels are used to

Increase delivery head
Reduce suction head
Reduce acceleration head
Smoothen the flow

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Hydraulics and Fluid Mechanics in ME
A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used?

Pelton wheel with two or more nozzles
Kaplan turbine
Pelton wheel with one nozzle
Francis turbine

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Hydraulics and Fluid Mechanics in ME
Rotameter is a device used to measure

rotation
absolute pressure
flow
velocity of fluid

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Hydraulics and Fluid Mechanics in ME
By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is

0.488
0.392
0.884
0.848

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Hydraulics and Fluid Mechanics in ME
When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)

√2gH
0.5 a. √2gH
0.855 a. √2gH
0.707 a. √2gH

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