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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Flow occurring in a pipeline when a valve is being opened is

unsteady
vortex
laminar
steady

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Hydraulics and Fluid Mechanics in ME
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

2V/(vr + v)
2V/(vr - v)
V/(vr + v)
V/(vr - v)

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

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Hydraulics and Fluid Mechanics in ME
Which place in hydraulic turbine is most susceptible for cavitations?

Inlet of draft rube
Penstock
Blade inlet
Guide blade

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Hydraulics and Fluid Mechanics in ME
The specific weight of water is 1000 kg/m3

At 4°C temperature
At mean sea level
All of the listed here
At normal pressure of 760 mm

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Hydraulics and Fluid Mechanics in ME
The specific weight of water in S.I. units is taken as

Any one of these
9.81 kN/m3
9.81 × 103 N/m3
9.81 × 10-6 N/mm3

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