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Hydraulics and Fluid Mechanics in ME

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

Double
Four times
Eight times
Sixteen times

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Hydraulics and Fluid Mechanics in ME
The equation of continuity holds good when the flow

is one dimensional
is steady
velocity is uniform at all the cross sec-tions
All of these

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Hydraulics and Fluid Mechanics in ME
If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water , the horse power required will be

Same
H.P./0.75
0.75 B.H.P
1.5 B.H.P

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Hydraulics and Fluid Mechanics in ME
One liter of water occupies a volume of

1000 cm3
250 cm3
500 cm3
100 cm3

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Hydraulics and Fluid Mechanics in ME
In axial flow fans and turbines, fluid enters and leaves as follows

Radially, axially
Radially, radially
Axially, axially
Axially, radially

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Hydraulics and Fluid Mechanics in ME
Reaction turbines are used for

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

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