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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of

atmospheric pressure
surface tension forces
air resistance
viscosity

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Hydraulics and Fluid Mechanics in ME
Which of the following instruments is used to measure flow on the application of Bernoulli’s theorem

Venturimeter
Orifice plate
All of these
pitot tube

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Hydraulics and Fluid Mechanics in ME
Coefficient of velocity of venturimeter

is equal to the coefficient of discharge of venturimeter
decreases with higher Reynolds number
is independent of Reynolds number
None of these

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Hydraulics and Fluid Mechanics in ME
The increase of temperature results in

decrease in viscosity of liquid
increase in viscosity of liquid
decrease in viscosity of gas
increase in viscosity of gas

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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

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

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Hydraulics and Fluid Mechanics in ME
If the depth of water in an open channel is less than the critical depth, the flow is called

Critical flow
Tranquil flow
Turbulent flow
Torrential flow

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