Fuels and Combustion MCQs

469 MCQs  — Chemical Engineering MCQs  (Page 32 of 47)

Attempt Fuels and Combustion Quiz
Gobar gas constitutes mainly of___________________?
A. Ch4 & co2
B. Co & co2
C. Ch4 & n2
D. Co & n2
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High temperature carbonisation of coal produces__________________?
A. Inferior coke compared to low temperature carbonisation
B. Less of gases compared to liquid products
C. Large quantity of tar compared to low temperature carbonisation
D. None of these
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Which of the following constituents of a fuel does not contribute to its calorific value on combustion ?
A. Hydrogen
B. Sulphur
C. Carbon
D. None of these
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Benzene is used__________________?
A. As a motor fuel
B. As an explosive
C. For making insecticides (e.g., ddt, bhc etc.), detergent & rubber (sbr)
D. As a perfume
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Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the_______________?
A. Hot scarfing of steel slabs
B. Mixing with blast furnace gas
C. Coke oven battery heating
D. Steel ladle drying
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Water gas constitutes mainly of __________________?
A. Co & h2
B. Co & n2
C. Co2 & h2
D. Ch4 & h2
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Efficient burning of anthracite coal requires______________________?
A. Low preheat of air
B. Fine grinding
C. High excess air
D. All a., b. and c
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Washing of coal is done to reduce the_________________?
A. Inherent impurities
B. Adhering impurities
C. Mineral matter
D. Both b. and c.
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Too much of excess air in combustion results in high___________________?
A. Fuel consumption for the same heat load
B. Stack gas temperature
C. Percentage of oxygen in flue gases
D. All a., b. and c.
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Coking time in narrow by-product coke ovens is around ______________ hours?
A. 18
B. 48
C. 8
D. 80
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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