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Fluid Mechanics

Fluid Mechanics
In case of supersonic flow of a fluid through pipeline, the 'Mach number' is

< 1
> 1
1

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

√d
d1/3
d2/3
d2

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Fluid Mechanics
Permanent loss in a venturimeter is about __________ percent of the pressure drop in theupstream cone.

70
1
40
10

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Fluid Mechanics
Which of the following must be followed by the flow of a fluid (real or ideal)? (I) Newton's law of viscosity. (II) Newton's second law of motion. (III) The continuity equation. (IV) Velocity of boundary layer must be zero relative to boundary. (V) Fluid cannot penetrate a boundary.

II, III, V
I, II, III
II, IV, V
I, II, V

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Fluid Mechanics
While starting an axial flow pump, its delivery valve should be kept

None of these
Either open or closed
Open
Closed

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Fluid Mechanics
In frictional fluid flow, the quantity, P/ρ + V²/2gc + gz/gc, is

None of these
Increased in the direction of flow
Not constant along a streamline
Constant along a streamline

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