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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is

slightly more
equal
nearly half
slightly less

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Hydraulics and Fluid Mechanics in ME
The jet ratio is defined as the ratio of the

Velocity of jet to the velocity of Pelton wheel
Diameter of jet to the diameter of Pelton wheel
Diameter of Pelton wheel to the diameter of jet
Velocity of Pelton wheel to the velocity of jet

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is generally used to pump highly viscous fluid?

Reciprocating pump
Air lift pump
Screw pump
Centrifugal pump

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Hydraulics and Fluid Mechanics in ME
The mass per unit volume of a liquid at a standard temperature and pressure is called

Specific weight
None of these
Mass density
Specific gravity

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Hydraulics and Fluid Mechanics in ME
A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?

4 x (225)3/2 minutes
4 x V225 minutes
4 minutes
4 (225)1/3 minutes

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Hydraulics and Fluid Mechanics in ME
The undershot water wheels are those in which

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

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