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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Which of the following instrument can be used for measuring speed of an aeroplane

Venturimeter
rotameter
pitot tube
Orifice plate

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Hydraulics & Fluid Mechanics
When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies

inversely as the square of the radial distance
as the square of the radial distance
inversely as the radial distance
linearly with radial distance

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

viscosity
friction
cohesion
surface tension

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Hydraulics & Fluid Mechanics
THEE HORIZONTAL COMPONENT OF BUOYANT FORCE IS

ZERO
NEGLIGIBLE
SAME AS BUOYANT FORCE
None of these

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Hydraulics & Fluid Mechanics
The line of action of the buoyant force acts through the centroid of the

volume of the floating body
displaced volume of the fluid
volume of the fluid vertically above the body
submerged body

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Hydraulics & Fluid Mechanics
An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is

10m/sec²
10.2/m sec
9.75 m/sec²
9.81 m/sec²

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