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Hydraulics and Fluid Mechanics in ME

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 depth
Twice the breadth
Half the depth
Half the breadth

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Hydraulics and Fluid Mechanics in ME
The Francis formula for the discharge over Cipoletti weir is

1.84 LH
1.84 LH1/2
1.84 LH3/2
1.84 LH5/2

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Hydraulics and Fluid Mechanics in ME
In a free nappe,

The pressure below the nappe is atmospheric
The pressure above the nappe is negative
The pressure above the nappe is atmospheric
The pressure below the nappe is negative

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Hydraulics and Fluid Mechanics in ME
Units of surface tension are

both of the above
energy/unit area
it has no units
distance

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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

1 kg
100 kg
1000 kg
10 kg

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Hydraulics and Fluid Mechanics in ME
A large Reynold number is indication of

Steady flow
Highly turbulent flow
Laminar flow
Smooth and streamline flow

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