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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The specific speed of a centrifugal pump, delivering 750 liters of water per second against a head of 15 meters at 725 r.p.m., is

24.8 r.p.m.
48.2 r.p.m
82.4 r.p.m.
248 r.p.m

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Hydraulics and Fluid Mechanics in ME
The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called

Viscosity
Compressibility
Capillarity
Surface tension

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Hydraulics and Fluid Mechanics in ME
The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to

0.01
0.0001
0.001
0.1

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Hydraulics and Fluid Mechanics in ME
A turbine pump is basically a centrifugal pump equipped additionally with

Backward curved blades
Adjustable blades
Inlet guide blades
Vaned diffusion casing

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is successfully used for lifting water to the turbines?

Jet pump
Air lift pump
Centrifugal pump
Reciprocating pump

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Hydraulics and Fluid Mechanics in ME
The efficiency of power transmission through pipe is (where H = Total supply head, and hf = Head lost due to friction in the pipe)

H/(H + hf )
H/(H - hf )
(H + hf )/H
(H - hf )/H

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