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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The flow in a pipe is neither laminar nor turbulent when Reynold number is

Between 2000 and 2800
More than 2800
Less than 2000
None of these

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Hydraulics and Fluid Mechanics in ME
Hydraulic accumulator is used for

Generally high pressures to operate hydraulic machines
Accumulating oil
Supplying large quantities of oil for very short duration
Supplying energy when main supply fails

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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 to

1000 kg
10 kg
100 kg
1 kg

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Hydraulics and Fluid Mechanics in ME
The torque required to overcome viscous resistance of a footstep bearing is (where μ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)

μπ²NR/60t
μπ²NR²/60t
μπ²NR³/60t
μπ²NR⁴/60t

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Hydraulics and Fluid Mechanics in ME
The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe)

v²/2g
0.375v²/2g
0.75v²/2g
0.5v²/2g

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Hydraulics and Fluid Mechanics in ME
The coefficient of viscosity may be determined by

Capillary tube method
All of these
Rotating cylinder method
Orifice type viscometer

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