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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The pitot tube is used to measure

dynamic pressure
stagnation pressure
velocity at stagnation point
static pressure

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Hydraulics and Fluid Mechanics in ME
The depth of the bucket for a Pelton wheel is generally _________ the diameter of jet.

1.2 times
Equal to
Double
1.8 times

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Hydraulics and Fluid Mechanics in ME
Dynamic similarity is said to exist between the model and the prototype, if both of them

None of these
Are identical in shape, but differ only in size
Have identical velocities
Are equal in size and shape

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Hydraulics and Fluid Mechanics in ME
A body floating in a liquid is said to be in neutral equilibrium, if its metacentre

Lies below its centre of gravity
Lies between the centre of buoyancy and centre of gravity
Coincides with its centre of gravity
Lies above its centre of gravity

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Hydraulics and Fluid Mechanics in ME
The bulk modulus of elasticity with increase in pressure

increases first upto certain limit and then decreases
increases
decreases
remains constant

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Hydraulics and Fluid Mechanics in ME
The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is

ηh = ηo × ηm
ηm = ηm × ηh
None of these
ηo = ηh × ηm

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