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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
Eight times
Four times
Sixteen times

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Hydraulics and Fluid Mechanics in ME
According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)

3flv²/2gd
flv²/2gd
flv²/gd
4flv²/2gd

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Hydraulics and Fluid Mechanics in ME
The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)

None of the listed here
K.ρ
ρ/K
K/ρ

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Hydraulics and Fluid Mechanics in ME
The discharge over a rectangular notch is

Directly proportional to H5/2
Directly proportional to H3/2
Inversely proportional to H3/2
Inversely proportional to H5/2

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Hydraulics and Fluid Mechanics in ME
The unit of kinematic viscosity in S. I. units is

N-m
N-s/m2
N-m/s
m2/s

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Hydraulics and Fluid Mechanics in ME
The pressure of liquid at throat in a Venturimeter is __________ than that at inlet.

Higher
None of these
Lower
Same

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