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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The unit of viscosity is

Meters² per sec
Newton-sec per meter²
Newton-sec per meter
kg-sec/meter

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Hydraulics and Fluid Mechanics in ME
When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is

1.84(L - 0.1nH)H5/2
1.84(L - nH)H2
1.84(L - nH)H3
1.84(L - 0.1nH)H3/2

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Hydraulics and Fluid Mechanics in ME
The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to

Archimedes’ principle
Buoyancy
Bernoulli’s theorem
Equilibrium of a floating body

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Hydraulics and Fluid Mechanics in ME
Mercury does not wet glass. This is due to property of liquid known as

viscosity
adhesion
surface tension
cohesion

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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

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

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Hydraulics and Fluid Mechanics in ME
The loss of pressure head in case of laminar flow is proportional to

(Velocity)3
(Velocity)4
(Velocity)2
Velocity

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