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Fluid Mechanics

Fluid Mechanics
The peripherial velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec.

186.2
12.4
736.4
1.8

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Fluid Mechanics
A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit (E) to deliver water at a flow rate of 0.001 m³/s? The Fanning friction factor, f is 0.0062.

20 m
10 m
12 m
11 m

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Fluid Mechanics
In deriving Bernoulli's equation, fluid is assumed to be

Uniform, steady, incompressible, along a streamline
Steady, density being pressure dependent, frictionless
Incompressible, frictionless, steady, along a streamline
None of these

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Fluid Mechanics
Pressure drop (Δp) for a fluid flowing in turbulent flow through a pipe is a function of velocity (V) as

V2
V-0.2
V2.7
V1.8

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Fluid Mechanics
Scale up of agitator design requires

Geometrical similarity only
Both geometrical and dynamic similarity
Dynamic similarity only
All of these

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Fluid Mechanics
Boundary layer thickness in turbulent flow over a flat plate increases as(where, d = distance from the leading edge.)

d1/3
d2/3
√d
d4/5

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