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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 speed of the wheel is

10 r.p.m.
40 r.p.m.
80 r.p.m.
20 r.p.m.

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Hydraulics and Fluid Mechanics in ME
Metacentre is the point of intersection of

All of these
mid point between e.g. and center of buoyancy
buoyant force and the center line of body
vertical upward force through e.g. of body and center line of body

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Hydraulics and Fluid Mechanics in ME
Liquids

Cannot be compressed
Are not affected by change in pressure and temperature
Occupy definite volume
None of the listed here

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Hydraulics and Fluid Mechanics in ME
Two pipe systems can be said to be equivalent, when the following quantites are same

friction loss and flow
friction factor and diameter
flow and length
length and diameter

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Hydraulics and Fluid Mechanics in ME
Size of a venturimeter is specified by

angle of diverging section
both pipe diameter as well as throat diameter
throat diameter
pipe diameter

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Hydraulics and Fluid Mechanics in ME
The working of which of the following hydraulic units is based on Pascal's law?

Hydraulic press
Air lift pump
Hydraulic coupling
Jet pump

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