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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Which of the following is demensionless

specific weight
specific gravity
specific volume
specific speed

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Hydraulics & Fluid Mechanics
The difference of pressure between the inside and outside of a liquid drop is

(d)p = 2T/r
(a)p = Txr
p = T/2r
(b)p = T/r

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Hydraulics & Fluid Mechanics
The peoperty by virtue of which a liquid opposes relative motion between its different layers is called

viscosity
surface tension
co-efficient of viscosity
osmosis

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Hydraulics & Fluid Mechanics
Coefficient of velocity for Borda’s mouth piece running full is

1.00
0.855
0.611
0.707

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Hydraulics & Fluid Mechanics
A perfect gas

is incompressible
None of these
is of theoretical interest
has constant viscosity

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Hydraulics & Fluid Mechanics
The resultant of all normal pressures acts

vertically upwards
at e.g. of body
at metacentre
at center of pressure

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