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Fluid Mechanics

Fluid Mechanics
__________ pump is the most suitable device for discharging a liquid against a pressure of ≥ 1500 kgf/cm².

Piston
Plunger
Centrifugal
Vane

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Fluid Mechanics
In case of turbulent flow of a Newtonion fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)

1.8 Vavg
1.5 Vavg
1.2 Vavg
Vavg

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Fluid Mechanics
A centrifugal pump is called a turbine pump, if it is having a

Rotating vaned volute
Turbine type impeller
None of these
Vaned diffusion casing

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Fluid Mechanics
Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the first fluid, the pressure drop will

Decrease
Increase
Data insufficient to predict relative pressure drop
Remain unchanged

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Fluid Mechanics
The Mach number for hypersonic flow of compressible fluid is

< 2
> 1
1
> 4

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Fluid Mechanics
The value of critical Reynolds number for pipe flow is

100000
1300
10000
None of these

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