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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A flow is called super-sonic if the

Velocity of flow is very high
None of these
Mach number is between 1 and 6
Discharge is difficult to measure

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Hydraulics and Fluid Mechanics in ME
A hydraulic accumulator normally consists of

Two cylinders, two rams and a storage device
A cylinder, a piston, storage tank and control valve
Two coaxial rams and two cylinders
A cylinder and a ram

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Hydraulics and Fluid Mechanics in ME
The units of kinematic viscosity are

metres² per sec
newton-sec per meter
newton-sec per meter
kg sec/meter

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Hydraulics and Fluid Mechanics in ME
In one dimensional flow, the flow

Is steady and uniform
Takes place in straight line
Takes place in one direction
Takes place in curve

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Hydraulics and Fluid Mechanics in ME
The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

1.855 aH.√(2g)
5.85 aH.√(2g)
0.855 a.√(2gH)
1.585 a.√(2gH)

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Hydraulics and Fluid Mechanics in ME
For pipes, turbulent flow occurs when Reynolds number is

less than 4000
between 2000 and 4000
more than 4000
less than 2000

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