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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
One poise is equal to

0.1 N-s/m2
10 N-s/m2
100 N-s/m2
1 N-s/m2

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Hydraulics and Fluid Mechanics in ME
If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water , the horse power required will be

1.5 B.H.P
H.P./0.75
0.75 B.H.P
Same

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Hydraulics and Fluid Mechanics in ME
The pressure at the summit of a syphon is

less than atmospheric
None of these
equal to atmospheric
more than atmospheric

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

Twice the breadth
Half the breadth
Twice the depth
Half the depth

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

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Hydraulics and Fluid Mechanics in ME
The property by virtue of which a liquid opposes relative motion between its different layers is called

Osmosis
Coefficient of viscosity
Surface tension
Viscosity

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