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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When the velocity distribution is uniform over the cross-section, the correction factor for momentum is

1
43924
2

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Hydraulics and Fluid Mechanics in ME
When the Mach number is less than unity, the flow is called

Super-sonic flow
Hyper-sonic flow
Sub-sonic flow
Sonic flow

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Hydraulics and Fluid Mechanics in ME
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by

dQ/Q = 2 × (dH/H)
dQ/Q = 3/2 × (dH/H)
dQ/Q = 5/2 × (dH/H)
dQ/Q = 3 × (dH/H)

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Hydraulics and Fluid Mechanics in ME
If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will

rise until its weight equals the buoyant force
tend to move downward and it may finally sink
None of these
float

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Hydraulics and Fluid Mechanics in ME
A pressure of 25 m of head of water is equal to

2.5 kN/m2
245 kN/m2
25 kN/m2
2500 kN/m2

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Hydraulics and Fluid Mechanics in ME
Rotameter is a device used to measure

velocity of fluid
absolute pressure
flow
rotation

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