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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following instruments is used to measure flow on the application of Bernoulli’s theorem

pitot tube
Orifice plate
All of these
Venturimeter

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Hydraulics and Fluid Mechanics in ME
The maximum number of jets, generally, employed in an impulse turbine without jet interference are

Two
Eight
Six
Four

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Hydraulics and Fluid Mechanics in ME
When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be

Steep
First rise and then fall
Horizontal
Nearly horizontal

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Hydraulics and Fluid Mechanics in ME
The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is

ηm = ηm × ηh
None of these
ηh = ηo × ηm
ηo = ηh × ηm

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Hydraulics and Fluid Mechanics in ME
The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcy’s coefficient of friction for pipe, and l = Length of pipe)

d = (D⁵/8fl)1/5
d = (D⁵/8fl)1/3
d = (D⁵/8fl)1/4
d = (D⁵/8fl)1/2

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Hydraulics and Fluid Mechanics in ME
The unit of viscosity is

Meters² per sec
Newton-sec per meter²
Newton-sec per meter
kg-sec/meter

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