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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
According to fan laws, for the fans having constant wheel diameters, the power demand varies

Directly as fan speed
Square root of fan speed
Cube of fan speed
Square of fan speed

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Hydraulics and Fluid Mechanics in ME
The value of coefficient of discharge is __________ the value of coefficient of velocity.

None of these
Same as
More than
Less than

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Hydraulics and Fluid Mechanics in ME
The specific weight of sea water is __________ that of pure water.

Less than
None of these
Same as
More than

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

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

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Hydraulics and Fluid Mechanics in ME
The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be

1000 kg
500 kg
2000 kg
1500 kg

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Hydraulics and Fluid Mechanics in ME
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

2ρ ω2 r2
ρ ω2 r2/2
ρ ω2 r2/4
ρ ω2 r2

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