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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The surface tension of mercury at normal temperature compared to that of water is

more
less
more or less depending on size of glass tube
same

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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
less than 1
200
between 1 and 100

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Hydraulics & Fluid Mechanics
The units of viscosity are

newton-sec/metre
kg sec/metre
newton-sec/metre2
metre2/se

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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

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

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Hydraulics & Fluid Mechanics
The discharge of a liquid of kinematic viscosity 4 cm²/sec through a 8 cm dia-meter pipe is 3200n cm7sec. The type of flow expected is

LAMINAR FLOW
NOT PREDICTABLE FROM THE GIVEN DATA
TURBULENT FLOW
TRANSITION FLOW

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

osmosis
co-efficient of viscosity
viscosity
surface tension

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