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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Piezometer is used to measure

Difference of pressure between two points
Pressure in pipe, channels etc
Very low pressures
Atmospheric pressure

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Hydraulics and Fluid Mechanics in ME
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance __________ from the liquid surface.

3H/4
H/3
H/2
2H/3

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Hydraulics and Fluid Mechanics in ME
The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by

[(Vr + v) v]/ Vr
[(Vr - v) v]/ Vr
[2(Vr - v) v]/ Vr²
[2(Vr + v) v]/ Vr²

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Hydraulics and Fluid Mechanics in ME
Principle of similitude forms the basis of

designing models so that the result can be converted to prototypes
comparing two identical equipments
comparing similarity between design and actual equipment
hydraulic designs

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

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

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Hydraulics and Fluid Mechanics in ME
In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be

Four times
Double
Sixteen times
Eight times

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