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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Hydrometer is used to determine

specific gravity of solids
specific gravity of gases
relative humidity
specific gravity of liquids

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

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

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Hydraulics and Fluid Mechanics in ME
A turbine develops 10000 kW under a head of 25 meters at 135 r.p.m. Its specific speed is

275.4 r.p.m
241.5 r.p.m.
215.5 r.p.m.
175.4 r.p.m.

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Hydraulics and Fluid Mechanics in ME
The optimum value of vane exit angle for a centrifugal pump impeller is

30-40°
50-60°
10-15°
20-25°

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Hydraulics and Fluid Mechanics in ME
The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

Unit speed
None of these
Specific speed
Normal speed

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

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MORE MCQ ON Hydraulics and Fluid Mechanics in ME

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