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Fluid Mechanics

Fluid Mechanics
Low specific speed of a pump implies that, it is a/an __________ pump.

Mixed flow
Axial flow
Centrifugal
None of these

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Fluid Mechanics
What is the value of Fanning friction factor f ' for smooth pipe at NRe = 10⁶ approximately?

0.01
0.3
0.1
0.003

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Fluid Mechanics
The equation given below is called the __________ . f-0.5 = 4.07 loge (NRe√f)-0.6

Fanning equation
None of these
Colebrook formula
Von-Karman equation

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Fluid Mechanics
Prandtl mixing length is

Zero at the pipe wall
None of these
A universal constant
Applicable to laminar flow problems

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Fluid Mechanics
Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg.

1
0.01
0.001
0.1

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Fluid Mechanics
Multistage compressors are used in industry, because they

Are easy to control
Reduce the size requirement
Reduce the cost of compressor
Resemble closely to isothermal compression

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