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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.

Ax̅ / IG below
IG / Ax̅ below
IG / Ax̅ above
Ax̅ / IG above

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Hydraulics and Fluid Mechanics in ME
According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

Inversely as square root of density
Directly as the air or gas density
Inversely as density
As square of density

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Hydraulics and Fluid Mechanics in ME
Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?

Hydraulic ram
Hydraulic torque converter
Hydraulic accumulator
Hydraulic intensifier

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Hydraulics and Fluid Mechanics in ME
A flow is called hyper-sonic, if the Mach number is

Unity
Less than unity
Between 1 and 6
None of these

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is generally used to pump highly viscous fluid?

Screw pump
Air lift pump
Reciprocating pump
Centrifugal pump

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Hydraulics and Fluid Mechanics in ME
The velocity distribution for laminar flow through a circular tube

varies linearly from zero at walls to maximum at centre
varies parabolically with maximum at the centre
None of these
is constant over the cross-section

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