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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

Carbon Content by weight in air dried wood may be about _______________ percent?
A 10
B 25
C 50
D 80
Correct Answer: 50
Which of the following has the least calorific value (kcal/Nm3) ?
A Blast furnace gas
B Coke oven gas
C Sewage gas
D Natural gas
Correct Answer: Blast furnace gas
Turndown ratio of a gas burner is equal to the __________________ ?
A Maximum to minimum heat input ratio
B Maximum to minimum permissible gas flow rate
C Both A. & B.
D Minimum to maximum heat input ratio
Correct Answer: Both A. & B.
Which of the following gaseous fuels has the lowest calorific value ?
A Gobar gas
B Refinery gas
C Converter gas
D Blast furnace gas
Correct Answer: Blast furnace gas
Ignition temperature of a fuel in air is ______________ that in pure oxygen?
A More than
B Less than
C Equal to
D Either more or less; depends on the type of fuel
Correct Answer: More than
Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of _____________________?
A MgO & Na2CO3
B MgSO4 & BaCl2
C BaSO4 & NaCl
D MgCO3 & NaCl
Correct Answer: MgO & Na2CO3
Higher percentage of ash in coal meant for the production of metallurgical grade coke ___________________?
A Decreases the hardness of coke
B Decreases the abrasion resistance of coke
C Causes brittleness in steel
D None of these
Correct Answer: None of these
Coal is heated in presence of air to a temperature of about _______________ °C, while determining its ash content for proximate analysis?
A 500
B 750
C 950
D 1100
Correct Answer: 750
Beehive coke oven________________?
A Facilitates by-products recovery
B Takes 2-3 days for coking of coal but requires no external fuel for heating
C Gives larger yield of coke (around 85%) as compared to by-product ovens
D Produces coke with very poor strength
Correct Answer: Takes 2-3 days for coking of coal but requires no external fuel for heating
Gross and net calorific value of a fuel will be the same__________________?
A If its ash content is zero
B If its carbon content is very low
C If its hydrogen/hydrogen compound content is zero
D Under no circumstances
Correct Answer: If its hydrogen/hydrogen compound content is zero
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