Fuels and Combustion MCQs

469 MCQs  — Chemical Engineering MCQs  (Page 10 of 47)

Attempt Fuels and Combustion Quiz
Which of the following is unsuitable fuel for producer gas manufacture ?
A. Coke
B. Anthracite
C. Coal having low fusion point of its ash
D. Coal having high fusion point of its ash
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A coal having higher volatile matter content, has lower_________________?
A. Smoking tendency on burning
B. Coke oven gas yield on carbonisation
C. Chance of catching fire during storage in open space
D. Ignition temperature
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Caking coal is desirable for_________________?
A. Burning on travelling grate
B. Coke making
C. Burning on firebars
D. All a., b. and c.
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Coals used for the generation of producer gas should have ____________________?
A. High caking index
B. Low fusion point of ash
C. High volatile matter content
D. Very low ash content (8-10%)
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Coke having higher porosity has ___________________?
A. Lower bulk density
B. Lower strength
C. Higher reactivity
D. All a., b. and c.
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Out of the following, which is the most important parameter for the blast furnace grade coke ?
A. Csr & cri
B. Ash content
C. Mositure content
D. Volatile matter content
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Artificial draught produced by a fan can be controlled by the___________________?
A. Speed of the fan
B. Damper
C. Variation in the pitch of the fan blades
D. All a., b. and c.
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Which of the following will be unsuitable for dust cleaning from flue gas at 400°C from a pulverised coal fired boiler ?
A. Multicyclones
B. Bag filter
C. Wet scrubber
D. Hydrocyclones
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In low temperature carbonisation (as compared to high temperature carbonisation) of coal__________________?
A. Ammonia yield is more
B. Aliphatic tar is produced
C. Free carbon in tar is more
D. All a., b. and c.
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Tar is a better fuel than furnace oil, because of its___________________?
A. Higher calorific value
B. Lower sulphur content
C. Higher emissivity (0.8-0.9) resulting in higher radiation heat transfer rate
D. Both a. and b.
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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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