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Fluid Mechanics

Fluid Mechanics
If the head over the triangular notch is doubled, the discharge will increase by __________ times.

2
2.828
4
5.657

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Fluid Mechanics
While starting a centrifugal pump, its delivery valve should be kept

Opened
Either opened or closed; depending on the fluid viscosity
Either opened or closed ; it does not make any difference
Closed

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Fluid Mechanics
Uniform fluid flow occurs, when the derivative of the flow variables satisfy the following condition.

∂/∂t = 0
∂/∂t = constant
∂/∂s = 0
∂/∂t = constant

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Fluid Mechanics
In Newton's law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is

44
0.044
4.4
0.44

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Fluid Mechanics
A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit (E) to deliver water at a flow rate of 0.001 m³/s? The Fanning friction factor, f is 0.0062.

12 m
20 m
11 m
10 m

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Fluid Mechanics
Potential flow is the flow of

Incompressible fluids with no shear
Incompressible fluids with shear
Compressible fluids with no shear
Compressible fluids with shear

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