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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
A perfect gas

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

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Hydraulics & Fluid Mechanics
Flow at constant rate through a tapering pipe is i) steady flow ii) uniform flow iii) unsteady flow iv) non-uniform flow The correct answer is

(ii) and (iii)
(i) and (ii)
(ii) and (iv)
(i)and(iv)

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Hydraulics & Fluid Mechanics
If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is

160
between 1 and 100
less than 1
200

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Hydraulics & Fluid Mechanics
Pressure of the order of 10''' torr can be measured by

Bourdon tube
Pirani Gauge
ionisastion gauge
Micro-manometer

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Hydraulics & Fluid Mechanics
The discharge through a V- notch varies as

H3’2
H5/2
H5’4 where H is head.
H1/2

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

co-efficient of viscosity
osmosis
surface tension
viscosity

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