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FLUID MECHANICS

Fluid Mechanics
If three pipes of different diameters, lengths & friction factors are connected in parallel, then (where, Q = flow rate, V= fluid velocity f = friction factor).

Q₁ = Q₂ = Q₃
V₁ = V₂ = V₃
F = f₁ + f₂ + f₃
Q = Q₁ + Q₂ + Q₃

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Fluid Mechanics
Reynolds number for flow of water at room temperature through 2 cm dia pipe at an average velocity of 5 cm/sec is around

1000
2000
100
10

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Fluid Mechanics
A double acting reciprocating pump compared to a single acting pump (of almost same size working under same pressure levels) would give almost double

Head
Efficiency
Discharge
None of these

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Fluid Mechanics
Volute type of casing is provided in a centrifugal pump to

Reduce the discharge fluctuation
Convert pressure head to velocity head
Increase the discharge
Convert velocity head to pressure head

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Fluid Mechanics
Which law/principle of solid mechanics is similar/equivalent to Newton's law of viscosity in fluid mechanics?

Newton
Hooke
Newton
Archimedes principle

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