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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

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

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Hydraulics and Fluid Mechanics in ME
Medium specific speed of turbine implies it is

Francis turbine
Impulse turbine
Any one of the above
Propeller turbine

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Hydraulics and Fluid Mechanics in ME
The length of a liquid stream while flowing over a weir __________ at the ends of the sill.

Contracts
Expands
None of these
Does not change

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Hydraulics and Fluid Mechanics in ME
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

V/(vr - v)
2V/(vr + v)
2V/(vr - v)
V/(vr + v)

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Hydraulics and Fluid Mechanics in ME
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.

Arithmetic mean
Geometric mean
Difference
Sum

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Hydraulics and Fluid Mechanics in ME
The bulk modulus of elasticity with increase in pressure

remains constant
decreases
increases first upto certain limit and then decreases
increases

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