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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The gross or total head of the turbine is the ___________ of the water levels at the head race and tail race.

Difference
None of these
Product
Sum

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Hydraulics and Fluid Mechanics in ME
Which of the following turbine is preferred for 0 to 25 m head of water?

Pelton wheel
None of these
Francis turbine
Kaplan turbine

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Hydraulics and Fluid Mechanics in ME
The force exerted by a moving fluid on an immersed body is directly proportional to the rate of change of momentum due to the presence of the body. This statement is called

Newton's law of motion
Newton's law of viscosity
Newton's law of cooling
Newton's law of resistance

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Hydraulics and Fluid Mechanics in ME
The coefficient of discharge for an external mouthpiece depends upon

Velocity of liquid
Area of mouthpiece
Length of mouthpiece
Pressure of liquid

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Hydraulics and Fluid Mechanics in ME
An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)

tanθ = a/2g
tanθ = 2 a/g
tanθ = a/g
tanθ = a2/2g

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Hydraulics and Fluid Mechanics in ME
The velocity at which the laminar flow stops, is known as

Lower critical velocity
None of these
Velocity of approach
Higher critical velocity

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