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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Saving of work done and power by fitting an air vessel to double acting reciprocating pump is of the order of

0.688
0.492
0.392
0.848

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Hydraulics and Fluid Mechanics in ME
In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle 'θ'. Sensitivity of inclined tube to sensitivity of U-tube is equal to

Sinθ
1/Cosθ
1/Sinθ
Cos θ

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Hydraulics and Fluid Mechanics in ME
The meatcentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is

14.1 sec
10.4 sec
4.1 sec
5.2 sec

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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 undershot water wheels are those in which

None of these
The wheel runs entirely by the weight of water
The wheel runs partly by the weight of water and partly by the impulse of water
The wheel runs entirely by the impulse of water

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

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

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