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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

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

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Hydraulics and Fluid Mechanics in ME
The ratio of absolute viscosity to mass density is known as

viscosity index
coefficient of viscosity
specific viscosity
kinematic viscosity

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Hydraulics and Fluid Mechanics in ME
The units of kinematic viscosity are

newton-sec per meter
kg sec/meter
newton-sec per meter
metres² per sec

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Hydraulics and Fluid Mechanics in ME
In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.

Less than
None of these
More than
Equal to

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Hydraulics and Fluid Mechanics in ME
In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.

None of these
Less than
More than
Equal to

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Hydraulics and Fluid Mechanics in ME
The stress-strain relation of the Newtonian fluid is

Parabolic
Linear
Inverse type
Hyperbolic

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