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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

In general, the limit of inflammability/explosion limit of fuel gases is widened by the__________________?
A Increase in gas pressure
B Increase in temperature (i.e. preheating)
C Use of pure oxygen for combustion instead of air
D All A., B. & C.
Correct Answer: All A., B. & C.
Traces of tar fog present in the coke oven gas is removed by_________________?
A Cyclone separator
B Wet packed scrubber
C Electrostatic precipitator
D Washing with monoethanolamine
Correct Answer: Electrostatic precipitator
Pick out the wrong statement ?
A Pulverised fuel can be completely burnt with less percentage of excess air compared to lump
B Low grade coal can be used, but generally high volatile matter coals are more suitable for
C Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible
D None of these
Correct Answer: None of these
Pick out the wrong statement ?
A Angle of repose of coal increases with its increasing size
B Specific gravity of coal increases with its increasing maturity
C Refractive index and reflectance of coal increases with the increasing rank of coal
D Specific heat of coal decreases with increases in the volatile matter and decrease in the C/H
Correct Answer: Specific heat of coal decreases with increases in the volatile matter and decrease in the C/H
‘Wobbe index’ is a characteristic of__________________?
A Solid fuels
B Gaseous fuels
C Liquid fuels
D Fat coals
Correct Answer: Gaseous fuels
Spontaneous combustion of coal on storage results due to___________________?
A Inadequate ventilation
B Low temperature oxidation
C Storage in large heaps with small surface to volume ratio
D All A., B. and C.
Correct Answer: All A., B. and C.
White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is_________________?
A Tar
B Coke oven gas
C Pitch
D Pulverised coke
Correct Answer: Coke oven gas
As the equilibrium moisture content of the coal increases, its___________________?
A Calorific value increases
B Swelling number decreases
C Swelling number increases
D Bulk density decreases
Correct Answer: Swelling number decreases
Which of the following is not used as a binder in coal briquetting ?
A Tar
B Molasses
C Pitch
D Line
Correct Answer: Line
Which of the following fuel gases has the highest calorific value ?
A Natural gas
B Coal bed methane (CBM)
C Liquefied petroleum gas (LPG)
D Sewage gas
Correct Answer: Liquefied petroleum gas (LPG)
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