Fluid Mechanics - Chemical Engineering Questions and Answers

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If two capillary tubes of dia 0.5 mm and 1 mm are dipped in a pot containing mercury, then the rise of mercury is

same in both the tubes.

greater in 1 mm dia tube.

greater in 0.5 mm dia tube.

zero in both the tubes.

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For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of

1/2

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Weber number is the ratio of inertial force to __________ force.

surface tension

gravity

viscous

elastic

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The curve of metacentre for a floating body __________ the curve of buoyancy.

is always below

is the evolute of

intersects at right angle

is tangential to

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At what value of crank angle (roughly), no flow of water from or into the air vessel takes place in case of a double acting reciprocating pump ?

40° and 140°

45° and 60°

90° and 80°

20° and 120°

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The range of a particular rotameter can be increased by

use of floats of different densities.

no means.

increasing the diameter of the float.

decreasing the diameter of the float.

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Which of the following is dimensionless ?

Angular velocity

Fanning friction factor

Specific volume

None of these

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A liquid is pumped at the rate of 600 litres using 1000 rpm. If the rpm is changed to 1100, the liquid pumped is __________ litres.

600

660

1.1

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A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a __________ pump.

sump

volute

vacuum

submerged