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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Water is a __________ fluid.

Real
Non-Newtonian
Ideal
Newtonian

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Hydraulics and Fluid Mechanics in ME
Hydraulic accumulator is used for

Supplying energy when main supply fails
Supplying large quantities of oil for very short duration
Accumulating oil
Generally high pressures to operate hydraulic machines

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

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

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Hydraulics and Fluid Mechanics in ME
Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by

0.1
0.2
0.15
0.05

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Hydraulics and Fluid Mechanics in ME
The overall efficiency for a Pelton wheel lies between

0.75 to 0.85
0.50 to 0.65
0.85 to 0.90
0.65 to 0.75

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Hydraulics and Fluid Mechanics in ME
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

2ρ ω2 r2
ρ ω2 r2/4
ρ ω2 r2/2
ρ ω2 r2

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