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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A flow whose streamline is represented by a straight line, is called __________ dimensional flow.

One
Three
Two
Four

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Hydraulics and Fluid Mechanics in ME
According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

(2/3) × Cd (L - nH) × √(2g) × H²
(2/3) × Cd (L - 0.1nH) × √(2g) × H3/2
(2/3) × Cd (L - nH) × √(2g) × H5/2
(2/3) × Cd (L - nH) × √(2gh)

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

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Hydraulics and Fluid Mechanics in ME
A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is

0.64
0.46
0.78
0.87

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

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

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Hydraulics and Fluid Mechanics in ME
A channel is said to be of most economical cross-section, if

It has minimum wetted perimeter
It gives maximum discharge for a given cross-sectional area and bed slope
All of these
It involves lesser excavation for the designed amount of discharge

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