Fuels and Combustion MCQs

469 MCQs  — Chemical Engineering MCQs  (Page 40 of 47)

Attempt Fuels and Combustion Quiz
With increase in C/H ratio of a fuel, the dew point of flue gases______________________?
A. Increases
B. Decreases
C. Remain same
D. May increase or decrease; depends on the type of fuel
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Coking time in a commercial high temperature coal carbonisation plant is about ______________ hours?
A. 6
B. 18
C. 28
D. 36
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Which of the following would require maximum amount of % excess air for complete combustion ?
A. Coke oven gas
B. Furnace oil
C. Pulverised coal
D. Lump coal (fixed on chain grate)
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Which of the following is not a micro component present in coal ?
A. Micrinite
B. Clarain
C. Fusinite
D. Liptinite
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Coke oven gas is a better fuel than blast furnace gas, because of its higher________________?
A. Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)
B. Adiabatic flame temperature
C. Heat release rate (thus requiring smaller combustion chamber)
D. All a., b. and c.
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A coal containing high amount of volatile matter will have__________________?
A. Low ignition temperature
B. Very little ash content
C. High fusion point of its ash
D. Low adiabatic flame temperature
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High amount of sulphur and phosphorous in coke causes ____________________ ?
A. Decrease in its calorific value
B. Increase in its strength
C. Brittleness of steel made by using it
D. None of these
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The calorific value of natural gas is about ______________ kcal/Nm3?
A. 10,000
B. 2,500
C. 25,000
D. 35,000
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Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than _______________ °C is liable to form clinker?
A. 1100
B. 1250
C. 1350
D. 1400
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Which of the following fuels has the highest calorific value per unit mass (kcal/kg) ?
A. Coal
B. Kerosene
C. Natural gas
D. Furnace oil
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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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