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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Free surface of a liquid tends to contract to the smallest possible area due to force of

surface tension
cohesion
viscosity
friction

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Hydraulics & Fluid Mechanics
A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ?

1 :25
1 : 5
1 : 2.5
1:50

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Hydraulics & Fluid Mechanics
According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to

more than the weight of the body
weight of the fluid displaced by the body
less than the weight of the body
the weight of the body

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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

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

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Hydraulics & Fluid Mechanics
THEE HORIZONTAL COMPONENT OF BUOYANT FORCE IS

NEGLIGIBLE
None of these
ZERO
SAME AS BUOYANT FORCE

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Hydraulics & Fluid Mechanics
The region between the separation streamline and the boundary surface of the solid body is known as

lift
wake
boundary layer
drag

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