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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
A large Roynold number is indication of

smooth and streamline flow
turbulent flow
highly turbulent flow.
LAMINAR FLOW

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Hydraulics & Fluid Mechanics
Least possible value of correction factor for i) kinetic energy is zero ii) kinetic energy is 1 iii) momentum is zero iv) momentum is 1 The correct statements are

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

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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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Hydraulics & Fluid Mechanics
For a floating body to be in equilibrium

meta center should be above e.g.
a righting couple should be formed
All of these
center of buoyancy and e.g. must lie on same vertical plane

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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
The increase in meta centric height i) increases stability ii) decreases stability iii) increases comfort for passengers iv) decreases comfort for passengers The correct answer is

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

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