Fuels and Combustion MCQs

469 MCQs  — Chemical Engineering MCQs  (Page 39 of 47)

Attempt Fuels and Combustion Quiz
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
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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
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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.
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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
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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
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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
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A good quality coal should have ___________________?
A. Low fusion point of ash
B. High ash content
C. High sulphur
D. None of these
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Out of the following fuels, the difference between gross and net calorific value will be minimum in case of___________________?
A. Coke oven gas
B. Water gas
C. Natural gas
D. Blast furnace gas
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When the coal is heated in absence of air, it is called its ________________?
A. Deoxidation
B. Gasification
C. Coalification
D. Carbonisation
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High temperature carbonisation of coal takes place at _______________ °C?
A. 2000
B. 600
C. 1100
D. 1600
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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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