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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

Shatter index of metallurgical coke on 2 inches and 0.5 inch screen should be respectively around _______________ percent?
A 80 and 97
B 95 and 100
C 40 and 70
D 25 and 97
Correct Answer: 80 and 97
Which of the following is a measure of the agglutinating (i.e., binding) property of coal ?
A Thickness of plastic layer
B Caking index
C Swelling index
D Gray-king index
Correct Answer: Caking index
By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of_______________?
A Tar
B Benzol
C Ammonia
D None of these
Correct Answer: Ammonia
Low temperature oxidation of coal is accelerated by the____________________?
A Storage in large heaps
B Storage in compressed piles
C Absence of porous or friable particles
D All A., B. and C.
Correct Answer: Storage in large heaps
As the C/H ratio of the fuel increases, the amount of CO2 formed on combustion _______________ for the same percentage of excess air?
A Decreases
B Increases
C Remain same
D May increase or decrease depending on the type of fuel
Correct Answer: Increases
Preheating of ______________ the flame temperature?
A The gaseous fuel before combustion decreases
B Combustion air decreases
C Either the fuel or the air or both, increases
D Either the fuel or the air does not affect
Correct Answer: Either the fuel or the air or both, increases
With increase in the time of carbonisation at a particular temperature (say 1000°C), the ______________ percentage in coke oven gas increases?
A Hydrogen
B Methane
C Unsaturated hydrocarbons
D All A., B. and C.
Correct Answer: Hydrogen
If CO2 is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as___________________?
A O2
B CO
C N2
D SO2
Correct Answer: O2
Presence of force moisture in coal is most disadvantageous during its __________________?
A Transportation and handling
B Washing
C Pulverisation
D Storage
Correct Answer: Pulverisation
High ash coals ____________________?
A Are soft & friable (poor strength and size stability)
B Require longer time of carbonisation as ash offers resistance to heat transfer
C Produce larger quantity of coke oven gas
D None of these
Correct Answer: Require longer time of carbonisation as ash offers resistance to heat transfer
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