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Hydraulics and Fluid Mechanics in ME

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

Sixteen times
Eight times
Four times
Double

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

increases
decreases
unpredictable
remains unaffected

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Hydraulics and Fluid Mechanics in ME
A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a

Nozzle
Notch
Weir
Mouthpiece

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Hydraulics and Fluid Mechanics in ME
According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.

None of these
Equal to
Directly proportional
Inversely proportional

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Hydraulics and Fluid Mechanics in ME
Reaction turbines are used for

High head and low discharge
High head
Low head and high discharge
Low head

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Hydraulics and Fluid Mechanics in ME
The wake

None of these
always occurs before a separation point
is a region of high pressure intensity
always occurs after a separation point

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