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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The flow which neglects changes in a transverse direction is known as

uniform flow
turbulent flow
steady flow
one dimensional flow

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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
Free surface of a liquid tends to contract to the smallest possible area due to force of

friction
surface tension
viscosity
cohesion

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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

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

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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
200
between 1 and 100
less than 1

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Hydraulics & Fluid Mechanics
The density of water is 1000 kg/m3 at

0°C
20°C
0°K
4°C

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