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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/2sinα
2p/sin (α/2)
p/sinα

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Hydraulics and Fluid Mechanics in ME
In order to avoid cavitation in centrifugal pumps

The delivery pressure should be high
The suction pressure should be high
The delivery pressure should be low
The suction pressure should be low

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Hydraulics and Fluid Mechanics in ME
Which of the following is used to measure the discharge ?

venturimeter
current meter
hotwire anemometer
pitot tube

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Hydraulics and Fluid Mechanics in ME
Working principle of dead weight pressure gauge tester is based on

Avogadro’s hypothesis
Newton’s law of viscosity
Pascal’s law
Dalton’s law of partial pressure

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Hydraulics and Fluid Mechanics in ME
The total pressure on an immersed surface inclined at an angle θ with the liquid surface is

wx
wAx/sinθ
wA
wAx

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Hydraulics and Fluid Mechanics in ME
The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

Specific speed
Unit speed
None of these
Normal speed

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