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Chemical Engineering MCQs
Chemical Engineering MCQs
6108 MCQs (Page 221 of 611)
Attempt Chemical Engineering Quiz
Capacity of a rotary dryer depends on its __________________?
A. Rpm
B. Inclination with ground surface
C. Both a. and b.
D. Neither a. nor b.
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The most common packing used in industrial operations is _______________ rings?
A. Raschig
B. Lessing
C. Cross-partition
D. Single spiral
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Refractory bricks are usually dried in a ________________ dryer?
A. Tray
B. Tunnel
C. Conveyor
D. Festoon
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Occurrence of ‘case hardening’ during drying of a high moisture solid cake _______________ the drying rate?
A. Increases
B. Decreases
C. Does not affect
D. Exponentially increases
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The binary diffusivity in gases at atmospheric conditions is about ___________________?
A. 10-9 cm/sec
B. 10-1 cm2/sec
C. 10-3 sec/cm
D. 10-4 cm2/sec2
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For absorbers, high pressure drop results in___________________?
A. Increased efficiency
B. Decreased efficiency
C. High operating cost
D. Better gas liquid contact
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_____________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid ?
A. Dew point
B. Bubble point
C. Dry bulb temperature
D. Wet bulb temperature
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Which of the following is not used as filter aid ?
A. Asbestos
B. Diatomaceous earth
C. Purified wood cellulose
D. Rice husk
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Which of the following mechanical conveyors does not come under the division „carriers‟ ?
A. Belt conveyor
B. Bucket elevator
C. Screw conveyor
D. Apron conveyor
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Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is ______________ microns?
A. < 5
B. 10 to 25
C. < 74
D. > 1000
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