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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The flow of water through the hole in the bottom of a wash basin is an example of

Uniform flow
Steady flow
Forced vortex
Free vortex

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Hydraulics and Fluid Mechanics in ME
In an immersed body, centre of pressure is

Could be above or below e.g. depending on density of body and liquid
Above the centre of gravity
Below be centre of gravity
At the centre of gravity

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Hydraulics and Fluid Mechanics in ME
A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal tc

10 kg
1 kg
1000 kg
100 kg

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Hydraulics and Fluid Mechanics in ME
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by

dQ/Q = (3/4) × (dH/H)
dQ/Q = (3/2) × (dH/H)
dQ/Q = (dH/H)
dQ/Q = (1/2) × (dH/H)

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Hydraulics and Fluid Mechanics in ME
The dynamic viscosity of gases __________ with rise in temperature.

Increases
None of these
Decreases
Remain unaffected

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

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