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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

Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene ?
A Smoking tendency of hydrocarbons increases in the order: paraffins → isoparaffins →
B Smoking tendency of paraffins increases with decrease in its molecular weight
C Smoking tendency of naphthenes decreases with its increasing molecular weight & also on
D Smoking tendency of aromatics decreases with increase in its molecular weight
Correct Answer: Smoking tendency of paraffins increases with decrease in its molecular weight
Mercaptans is represented as (where R and R’ are alkyl groups) _____________________?
A R-COOH
B R-S-H
C R-S-R
D R-S-R’
Correct Answer: R-S-H
Cetane number of alpha methyl naphthalene is assumed to be_________________?
A 0
B 100
C 50
D ∞
Correct Answer: 0
Which of the following is desirable in diesel and kerosene but is undesirable in gasoline ?
A Aromatics
B Mercaptans
C Paraffins
D Naphthenic acid
Correct Answer: Aromatics
Flash point of diesel/kerosene (>50°C) is determined by the_______________?
A Abel apparatus
B Pensky-Martens apparatus
C Saybolt chromometer
D None of these
Correct Answer: Abel apparatus
Naphthenic acid is a/an ______________ compound?
A Sulphur
B Nitrogen
C Oxygen
D None of these
Correct Answer: Oxygen
LPG when brought to atmospheric pressure & temperature will be a________________?
A Liquid lighter than water
B Liquid heavier than water
C Gas lighter than air
D Gas heavier than air
Correct Answer: Gas heavier than air
The yield of straight run LPG from crude oil is about ______________ weight percent?
A 20-25
B 1-1.5
C 10-15
D 0.1-0.2
Correct Answer: 1-1.5
Performance number of a liquid fuel is related to its __________________?
A Wax content
B Spontaneous ignition temperature
C Knocking tendency
D Sulphur content
Correct Answer: Spontaneous ignition temperature
Petroleum coke is used mainly in the __________________ ?
A Discoloration of yellow glycerine
B Sugar refining
C Manufacture of carbon electrode
D Blast furnace for reduction of iron ore
Correct Answer: Manufacture of carbon electrode
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