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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The depth of the bucket for a Pelton wheel is generally _________ the diameter of jet.

Double
1.8 times
Equal to
1.2 times

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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 × hf
w × Q (H - hf)
w × Q (H + hf)

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Hydraulics and Fluid Mechanics in ME
Dynamic similarity is said to exist between the model and the prototype, if both of them

Are identical in shape, but differ only in size
Have identical velocities
None of these
Are equal in size and shape

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Hydraulics and Fluid Mechanics in ME
Barometer is used to measure

Very low pressure
Atmospheric pressure
Difference of pressure between two points
Pressure in pipes, channels etc.

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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

Four times
Eight times
Double
Sixteen times

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Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of

viscosity
atmospheric pressure
surface tension forces
air resistance

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