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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
In a lock-gate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)

2p/sinα
p/sinα
p/2sinα
2p/sin (α/2)

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

surface tension forces
viscosity
atmospheric pressure
air resistance

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Hydraulics and Fluid Mechanics in ME
The cavitation in a hydraulic machine

Causes noise and vibration of various parts
Reduces the discharge of a turbine
All of these
Causes sudden drop in power output and efficiency

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Hydraulics and Fluid Mechanics in ME
The pressure of fluid due to hammer blow is

Directly proportional to (density)1/2 of fluid
Inversely proportional to (density)1/2 of fluid
Directly proportional to density of fluid
Inversely proportional to density of fluid

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Hydraulics and Fluid Mechanics in ME
For pipes, laminar flow occurs when Reynolds number is

More than 4000
Less than 4000
Less than 2000
Between 2000 and 4000

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Hydraulics and Fluid Mechanics in ME
Liquids

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

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MORE MCQ ON Hydraulics and Fluid Mechanics in ME

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