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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

(2 L.A.N)/60
2 L.A.N
(L.A.N)/60
L.A.N

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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 triangular notch is given by

dQ/Q = 5/2 × (dH/H)
dQ/Q = 3 × (dH/H)
dQ/Q = 3/2 × (dH/H)
dQ/Q = 2 × (dH/H)

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Hydraulics and Fluid Mechanics in ME
If the coefficient of discharge is 0.6, then the discharge over a right angled notch is

7.141 H5/2
4.171 H5/2
0.417 H5/2
1.417 H5/2

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Hydraulics and Fluid Mechanics in ME
Barometer is used to measure

Pressure in pipes, channels etc.
Very low pressure
Atmospheric pressure
Difference of pressure between two points

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Hydraulics and Fluid Mechanics in ME
The critical depth meter is used to measure

Hydraulic jump
Velocity of flow in an open channel
Depth of channel
Depth of flow in an open channel

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Hydraulics and Fluid Mechanics in ME
The surface tension of mercury at normal temperature is __________ that of water.

Higher than
Lower than
Same as
None of these

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