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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A flow is called hyper-sonic, if the Mach number is

None of these
Between 1 and 6
Unity
Less than unity

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Hydraulics and Fluid Mechanics in ME
Specific speed for reaction turbines ranges from

250 to 300
10 to 100
80 to 200
0 to 4.5

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Hydraulics and Fluid Mechanics in ME
Center of buoyancy is the

does not exist
center of pressure of displaced volume
centroid of the displaced volume of fluid
e.g. of floating body

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Hydraulics and Fluid Mechanics in ME
Alcohol is used in manometers because

It is clearly visible
It has low vapour pressure
It can provide longer column due to low density
It has low surface tension

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Hydraulics and Fluid Mechanics in ME
The ratio of the inertia force to the viscous force is called

Reynold's number
Euler's number
Weber's number
Froude's number

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

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