Fuels and Combustion MCQs

469 MCQs  — Chemical Engineering MCQs  (Page 38 of 47)

Attempt Fuels and Combustion Quiz
Which of the following is a rich fuel gas ?
A. Producer gas
B. Coal gas from underground gasification of coal
C. Refinery gases
D. None of these
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Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of__________________?
A. Less air for combustion
B. Correct amount of air for combustion
C. Too much air for combustion
D. Pulverised coal in boilers
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Yield of blast furnace gas is about _______________ Nm3 /ton of pig iron?
A. 300
B. 2000
C. 5000
D. 10000
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Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces __________________?
A. Higher amount of methane
B. Lower amount of hydrogen
C. Both a. and b.
D. Higher amount of both methane and hydrogen
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Coal is heated in absence of air for 7 minutes at a temperature of about ______________ °C, during its volatile matter determination for proximate analysis?
A. 550
B. 750
C. 950
D. 1150
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Moisture loss is determined by the _______________________?
A. Humidity of combustion air
B. Mositure content of fuel
C. Both a. and b.
D. The water formed by combustion reaction
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High ash coals ____________________?
A. Are soft & friable (poor strength and size stability)
B. Require longer time of carbonisation as ash offers resistance to heat transfer
C. Produce larger quantity of coke oven gas
D. None of these
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Presence of force moisture in coal is most disadvantageous during its __________________?
A. Transportation and handling
B. Washing
C. Pulverisation
D. Storage
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If CO2 is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as___________________?
A. O2
B. Co
C. N2
D. So2
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With increase in the time of carbonisation at a particular temperature (say 1000°C), the ______________ percentage in coke oven gas increases?
A. Hydrogen
B. Methane
C. Unsaturated hydrocarbons
D. All a., b. and c.
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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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