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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.

All Topics  9594

____________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.)?

A Hemispherical
B Dished
C Ellipsoidal
D Conical
Correct Answer: Ellipsoidal

The slope of the feed line in distillation operation is given by (where, q = fraction of the feed stream that is liquid ?

A -q
B -q/(1-q)
C -q/(q-1)
D None of these
Correct Answer: -q

The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from__________________?

A 2 to 3
B 3 to 5
C 4 to 8
D 6 to 12
Correct Answer: 4 to 8

Liquid gradient over the tray results due to the___________________?

A Resistance offered to flow of liquids by caps & risers and the flow of gas
B Low gas velocity
C Large plate spacing
D Large reflux ratio
Correct Answer: Resistance offered to flow of liquids by caps & risers and the flow of gas

Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the_______________?

A Flow rates of each fluid
B Type and size of packing
C Concentration of each fluid
D All A, B. & C.
Correct Answer: All A, B. & C.

Heat transfer co-efficient, hG(Kcal/hr.m2 .°C) and mass velocity of air, G (kg/hr.m2 ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to ____________________?

A hG = 1.004G0.37
B 1.004G0.8
C hG = 0.0176G0.37
D 0.0176G1.37
Correct Answer: hG = 1.004G0.37

The most common standard size of bubble caps used in industrial operation is___________________?

A 1″ dia cap with 0.5″ dia riser
B 6″ dia cap with 4″ dia riser
C 8″ dia cap with 1″ dia riser
D 4″ dia cap with 8″ dia riser
Correct Answer: 6″ dia cap with 4″ dia riser

Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to _____________________?

A 5 cms
B 40% of the I.D. of the shell
C 25 cms
D I.D. of the shell
Correct Answer: 5 cms

Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling ?

A CO2
B SO2
C NH3
D None of these
Correct Answer: NH3

The slope of operating line in the rectifying section of a distillation column is unity, if the reflux ratio is___________________?

A 0
B ∞
C 1
D Minimum
Correct Answer: ∞
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