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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

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

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Hydraulics and Fluid Mechanics in ME
Ratio of inertia force to surface Jension is known as

Mach number
Froude number
Reynold’s number
Weber’s number

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Hydraulics and Fluid Mechanics in ME
One liter of water occupies a volume of

1000 cm3
250 cm3
500 cm3
100 cm3

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Hydraulics and Fluid Mechanics in ME
A flow in which __________ force is dominating over the viscosity is called turbulent flow.

Surface tension
Viscous
Elastic
Inertia

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Hydraulics and Fluid Mechanics in ME
Hydraulic accumulator is used for

Accumulating oil
Generally high pressures to operate hydraulic machines
Supplying energy when main supply fails
Supplying large quantities of oil for very short duration

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Hydraulics and Fluid Mechanics in ME
Viscosity of water in comparison to mercury is

Same
Lower
Higher/lower depending on temperature
Higher

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