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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies

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

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Hydraulics and Fluid Mechanics in ME
In series-pipe problems

a trial solution is not necessary
the head loss is same through each pipe
the discharge through each pipe is added to obtain total discharge
the discharge is same through each pipe

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Hydraulics and Fluid Mechanics in ME
In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be

Double
Eight times
Four times
Sixteen times

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Hydraulics and Fluid Mechanics in ME
The runaway speed of a hydraulic turbine is the speed

At which there will be no damage to the runner
At full load
At which the turbine will run freely without load
Corresponding to maximum overload permissible

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Hydraulics and Fluid Mechanics in ME
The discharge in an open channel corresponding to critical depth is

None of these
Minimum
Maximum
Zero

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Hydraulics and Fluid Mechanics in ME
Newton’s law of viscosity relates

shear stress, viscosity and temperature
viscosity and rate of angular deformation
shear stress and rate of angular deformation
intensity of pressure and rate of angular deformation

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