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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit discharge of wheel is

2.5 m3/s
0.25 m3/s
0.5 m3/s
1.5 m3/s

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Hydraulics and Fluid Mechanics in ME
If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge

Q/0.75
1.5 Q
0.75 Q
Same quantity of liquid

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Hydraulics and Fluid Mechanics in ME
The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is

3.0 m
2.5 m
2.4 m
4.0 m

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Hydraulics and Fluid Mechanics in ME
The coefficient of discharge for an external mouthpiece depends upon

Length of mouthpiece
Velocity of liquid
Area of mouthpiece
Pressure of liquid

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Hydraulics and Fluid Mechanics in ME
The type of centrifugal pump preferred for a specific speed of 20 r.p.m. is

High speed pump with radial flow at outlet
Slow speed pump with radial flow at outlet
Medium speed pump with radial flow at outlet
High speed pump with axial flow at outlet

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Hydraulics and Fluid Mechanics in ME
Which place in hydraulic turbine is most susceptible for cavitations?

Blade inlet
Inlet of draft rube
Guide blade
Penstock

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