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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
In a forced vortex, the velocity of flow everywhere within the fluid is

non-zero finite
minimum
maximum
zero

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Hydraulics and Fluid Mechanics in ME
Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called

viscosity
adhesion
compressibility
cohesion

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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)1/4
d = (D⁵/8fl)1/3
d = (D⁵/8fl)1/2

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Hydraulics and Fluid Mechanics in ME
Maximum impulse will be developed in hydraulic ram when

Waste valve closes suddenly
Ram chamber is large
Supply pipe is long
Supply pipe is short

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Hydraulics and Fluid Mechanics in ME
The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to

21000
2700
2100
10000

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Hydraulics and Fluid Mechanics in ME
One liter of water occupies a volume of

500 cm3
100 cm3
250 cm3
1000 cm3

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