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Hydraulics and Fluid Mechanics in ME

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

Less than
More than
Same as
None of these

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Hydraulics and Fluid Mechanics in ME
The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)

(2/3) Cd × b × √(2g) × H
(2/3) Cd × b × √(2gH)
(2/3) Cd × b × √(2g) × H3/2
(2/3) Cd × b × √(2g) × H2

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Hydraulics and Fluid Mechanics in ME
The viscosity of a gas

increases with increase in temperature
is independent of temperature
decreases with increase in temperature
is independent of pressure for very high pressure intensities

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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 process of diffusion of one liquid into the other through a semi-permeable membrane is called

surface tension
cohesion
viscosity
osmosis

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Hydraulics and Fluid Mechanics in ME
The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is (Assume that boundary layer is entirely laminar)

0.10 cm
0.40 cm
0.05 cm
0.20 cm

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