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Fluid Mechanics

Fluid Mechanics
In Newton's law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is

0.044
0.44
4.4
44

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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).

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

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Fluid Mechanics
A hydraulic ram acts as a/an __________ pump.

Centrifugal
Reciprocating
Parallel cylinder
Impulse

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Fluid Mechanics
Permanent pressure loss in a well designed venturimeter is about __________ percent of the venturi differential.

30
1
10
50

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Fluid Mechanics
The equivalent diameter for flow through a rectangular duct of width B and height H is

4HB/(H + B)
2HB/(H + B)
HB/(H + B)
HB/2(H + B)

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Fluid Mechanics
For a stable equilibrium of a submerged body (where, G and B are centres of gravity & buoyancy respectively).

G is above B
None of these
B is above G
B & G coincide

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