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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following velocity potentials satisfies continuity equation ?

x2 + y2
x2y
x2-y2
cosx

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Hydraulics and Fluid Mechanics in ME
The increase of temperature results in

increase in viscosity of liquid
decrease in viscosity of gas
decrease in viscosity of liquid
increase in viscosity of gas

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Hydraulics and Fluid Mechanics in ME
The divergent portion of a Venturimeter is made longer than convergent portion in order to

None of these
Both (A) and (B)
To minimize frictional losses
Avoid the tendency of breaking away the stream of liquid

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Hydraulics and Fluid Mechanics in ME
The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by

[2(Vr - v) v]/ Vr²
[(Vr + v) v]/ Vr
[(Vr - v) v]/ Vr
[2(Vr + v) v]/ Vr²

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Hydraulics and Fluid Mechanics in ME
The discharge through a reaction turbine ___ with the increase in unit speed.

Remain same
Increases
Decreases
None of the listed here

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Hydraulics and Fluid Mechanics in ME
The volume of a fluid __________ as the pressure increases.

Increases
Remains same
None of these
Decreases

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