M C Q s D r i v e

Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

Pick out the wrong statement?
A Safety valves are provided in heat exchangers for removal of non-condensable
B Liquid metals and Dowtherm are used for very high temperature heating
C In a shell and tube heat exchanger, high pressure fluid is generally routed through the tube
D A loop seal or U-seal is provided in a vertical condenser sub-cooler to prevent quick draining
Correct Answer: Safety valves are provided in heat exchangers for removal of non-condensable
Pick out the wrong statement pertaining to ‘Horton sphere’ used for the storage of liquid ammonia ?
A Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column
B Thickness of spherical shell is half that of the cylindrical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape; hence insulation required is less
C Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm2
D Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm2
Correct Answer: Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm2
Pick out the wrong statement about distillation operation__________________?
A Distillation under vacuum is a substitute for steam distillation
B In differential (simple) distillation, the vapour is removed as soon as it is formed without appreciable condensation
C In flash (equilibrium) distillation, a definite fraction of liquid is vaporised in such a way that the evolved vapour & residual liquids are in equilibrium with each other
D Flash distillation, differential distillation & steam distillation are all continuous distillation processes
Correct Answer: Flash distillation, differential distillation & steam distillation are all continuous distillation processes
Weep holes provided in the plates of a distillation column ____________________?
A Facilitate draining out liquid from a tray when the unit is not in operation
B Are normally located near the overflow weir so that any delivery of liquid during operation
C Must be large enough (usually 1/4″ to 5/8″ dia) to prevent plugging but should not deliver
D All A., B. and C.
Correct Answer: All A., B. and C.
Tube height in a calandria type evaporator is normally less than _______________ metres?
A 1
B 2
C 3.5
D 5.5
Correct Answer: 2
The ratio, (propeller agitator dia/tank dia) is normally taken as____________________?
A 0.15-030
B 0.5-0.65
C 0.75-0.85
D 0.60-0.90
Correct Answer: 0.15-030
Normal screwed fittings are used for pipes upto a diameter of _______________ inches?
A 1.5
B 3
C 5
D 9
Correct Answer: 3
The ratio of lateral strain to linear strain is termed as the___________________?
A Poisson’s ratio
B Bulk modulus
C Modulus of elasticity
D Shear modulus
Correct Answer: Poisson’s ratio
What is the slope of the operating line in the rectifying section of a distillation column ?
A 0
B
C > 1
D <1
Correct Answer: <1
Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscosity above ____________________ poise?
A 300
B 600
C 1000
D 1500
Correct Answer: 600