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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The flow in a pipe is neither laminar nor turbulent when Reynold number is

Between 2000 and 2800
None of these
More than 2800
Less than 2000

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Hydraulics and Fluid Mechanics in ME
Dynamic viscosity of most of the liquids with rise in temperature

Remain unaffected
Unpredictable
Decreases
Increases

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Hydraulics and Fluid Mechanics in ME
Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?

Hydraulic ram
Hydraulic intensifier
Hydraulic torque converter
Hydraulic accumulator

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Hydraulics and Fluid Mechanics in ME
According to fan laws, for the fans having constant wheel diameters, the power demand varies

Square of fan speed
Cube of fan speed
Directly as fan speed
Square root of fan speed

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Hydraulics and Fluid Mechanics in ME
The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s)

w × Q × H
w × Q (H - hf)
w × Q (H + hf)
w × Q × hf

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Hydraulics and Fluid Mechanics in ME
Piezometer is used to measure

Difference of pressure between two points
Atmospheric pressure
Pressure in pipe, channels etc
Very low pressures

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