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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge through a reaction turbine ___ with the increase in unit speed.

Increases
Decreases
None of the listed here
Remain same

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Hydraulics and Fluid Mechanics in ME
The divergent portion of a Venturimeter is made longer than convergent portion in order to

Avoid the tendency of breaking away the stream of liquid
None of these
Both (A) and (B)
To minimize frictional losses

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Hydraulics and Fluid Mechanics in ME
A differential manometer is used to measure

Pressure in pipes and channels
Atmospheric pressure
Difference of pressures between two points in a pipe
Pressure in Venturimeter

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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
Kaplan turbine
None of these
Francis turbine

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Hydraulics and Fluid Mechanics in ME
When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface.

Convex
Plane
None of these
Concave

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Hydraulics and Fluid Mechanics in ME
The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to

1/2 × depth
1/2 × sloping side
1/4 × (depth + breadth)
1/2 × breadth

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