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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.

0.67 times
0.81 times
0.34 times
0.95 times

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Hydraulics and Fluid Mechanics in ME
In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by

Some other alterations in the impeller
Designing new impeller
Not possible
Trimming the impeller size to the required size by machining

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

43924
2
1

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe is turbulent when Reynold number is

None of these
Less than 2000
More than 2800
Between 2000 and 2800

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Hydraulics and Fluid Mechanics in ME
The unit of dynamic viscosity in S.I. units is

Stoke
Poise
N-m/s²
N-s/m²

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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

0.87
0.78
0.64
0.46

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