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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

Which will have the least volatile matter and hence will be the most difficult to ignite ?
A Bituminous coal
B Coke
C Semi-bituminous coal
D Anthracite
Correct Answer: Coke
Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal ?
A Vitrain
B Clarain
C Durain
D Fussain
Correct Answer: Vitrain
High sulphur content in a fuel ______________ of the flue gases?
A Decreases the dew point
B Increases the dew point
C Reduces the combustion efficiency by limiting the permissible temperature reduction
D Both B. and C.
Correct Answer: Both B. and C.
Low temperature oxidation of stored coal results in the________________?
A Decrease in its caking power & calorific value
B Decrease in its carbon & hydrogen content
C Increase in its oxygen content
D All A., B. and A.
Correct Answer: All A., B. and A.
High rate of heating of coke ovens____________________?
A May damage its walls due to abrupt excessive swelling of coal
B Produces larger size coke
C Increases the time of carbonisation
D None of these
Correct Answer: May damage its walls due to abrupt excessive swelling of coal
ombustion of pulverised coal compared to the lumpy coal __________________?
A
B Facilitates combustion with lower excess air
C Provides higher thermal efficiency & flame temperature
D All A., B. & C.
Correct Answer: All A., B. & C.
Supply of excess air for complete combustion of fuel is necessitated to facilitate___________________?
A Its thorough mixing with air
B Attainment of chemical equilibrium
C Attainment of high temperature
D None of these
Correct Answer: Its thorough mixing with air
Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about ______________°C?
A 70
B 85
C 105
D 145
Correct Answer: 105
Coke oven gas burns with a yellowish flame, because of the presence of __________________?
A CO2
B CH4
C H2
D NH3
Correct Answer: CH4
With increase in moisture content of coal, its___________________?
A Calorific value increases
B Caking properties diminish
C Swelling during carbonisation becomes excessive
D None of these
Correct Answer: Caking properties diminish
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