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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

viscosity
surface tension
cohesion
friction

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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

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

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Hydraulics & Fluid Mechanics
Flow of water in a pipe about 3 meters in diameter can be measured by

rotameter
venturi
pitot tube
orifice plate

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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 : 2.5
1:50
1 : 5
1 :25

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Hydraulics & Fluid Mechanics
For measuring flow by a venturimeter, if should be installed in

horizontal line
inclined line with upward flow
in any direction and in any location.
vertical line

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Hydraulics & Fluid Mechanics
In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is

50 M/SEC
22.5 M/SEC
33 M/SEC
40 M/SEC

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