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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The eddy viscosity for turbulent flow is

independent of the flow
a function of temperature only
a physical property of the fluid.
dependent on the flow

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Hydraulics and Fluid Mechanics in ME
Bernoulli equation deals with the law of conservation of

momentum
mass
energy
work

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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

Eight times
Sixteen times
Double
Four times

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Hydraulics and Fluid Mechanics in ME
In the case of steady flow of a fluid, the acceleration of any fluid particle is

zero
variable
constant
zero under limiting conditions

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Hydraulics and Fluid Mechanics in ME
Power required (in watts) to drive a centrifugal pump is (where Hm = Manometric head in metres, w = Specific weight in N/m3, Q = Discharge of the pump in m3/s, and ηo = Overall efficiency of the pump)

(w Hm Q) / ηo
(w Hm) / (Q × ηo)
(w Q) / (Hm × ηo)
(w Q ηo) / Hm

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Hydraulics and Fluid Mechanics in ME
The pressure at a point 4 m below the free surface of water is

29.24 kPa
49.24 kPa
19.24 kPa
39.24 kPa

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