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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is

equal
slightly more
nearly half
slightly less

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Hydraulics and Fluid Mechanics in ME
Bulk modulus of a fluid __________ as the pressure increases.

Increases
Decreases
None of these
Remain same

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Hydraulics and Fluid Mechanics in ME
Multistage centrifugal pumps are used to

Give high discharge
Pump viscous fluids
Produce high heads
All of these

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Hydraulics and Fluid Mechanics in ME
The volumetric change of the fluid caused by a resistance is known as

Volumetric index
Volumetric strain
Adhesion
Compressibility

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Hydraulics and Fluid Mechanics in ME
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

ρ ω2 r2/4
2ρ ω2 r2
ρ ω2 r2
ρ ω2 r2/2

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Hydraulics and Fluid Mechanics in ME
The divergent portion of a Venturimeter is made longer than convergent portion in order to

None of these
Avoid the tendency of breaking away the stream of liquid
Both (A) and (B)
To minimize frictional losses

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