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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wave), the portion of pipe length subjected to maximum head is

L/3
L/2
L
L/4

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Hydraulics and Fluid Mechanics in ME
Coefficient of velocity of venturimeter

is equal to the coefficient of discharge of venturimeter
is independent of Reynolds number
None of these
decreases with higher Reynolds number

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Hydraulics and Fluid Mechanics in ME
The type of centrifugal pump preferred for a specific speed of 20 r.p.m. is

High speed pump with radial flow at outlet
High speed pump with axial flow at outlet
Slow speed pump with radial flow at outlet
Medium speed pump with radial flow at outlet

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Hydraulics and Fluid Mechanics in ME
Center of pressure on an inclined plane is

Above the Centroid
At metacentre
Below the Centroid
At the Centroid

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Hydraulics and Fluid Mechanics in ME
For manometer, a better liquid combination is one having

lower surface tension
higher surface tension
surface tension is no criterion
high density and viscosity

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Hydraulics and Fluid Mechanics in ME
Density of water is maximum at

100°C
0°K
4°C
0°C

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