Fuels and Combustion MCQs

469 MCQs  — Chemical Engineering MCQs  (Page 36 of 47)

Attempt Fuels and Combustion Quiz
Calorific value of both the solid & liquid fuels can be determined by using ______________ calorimeter?
A. Junker’s
B. Bomb
C. Boy’s
D. None of these
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The advantage of firing pulverised coal in the furnace lies in the fact, that it____________________?
A. Permits the use of high ash content coal
B. Permits the use of low fusion point ash coal
C. Accelerates the burning rate and economises on fuel combustion
D. All a., b. and c.
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Function of secondary air in pulverised coal firing is to_________________?
A. Transport the coal to the burner
B. Dry the coal
C. Ensure efficient burning of coal around the burner
D. Reduce primary air requirement
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A coal having higher volatile matter content will necessarily have lower____________________?
A. Ash fusion temperature
B. Calorific value
C. Ignition temperature
D. Caking index
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Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around ______________ cm/hr?
A. 2.5
B. 0.5
C. 10
D. 20
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Low temperature carbonisation of coal produces_________________?
A. Metallurgical coke
B. Soft coke
C. Very low calorific value coke oven gas
D. No by-products
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For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will_____________________?
A. Increase
B. Decrease
C. Increase or decrease depending on the fuel type
D. Not change
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Blast furnace coke is made from coal by_____________________?
A. Low temperature carbonisation
B. High temperature carbonisation
C. Medium temperature carbonisation
D. Heating the coal in an oven in presence of air
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In flue gas analysis by Orsat’s apparatus, oxygen is absorbed by____________________?
A. Potassium hydroxide
B. Cuprous chloride
C. Alkaline pyrogallol solution
D. None of these
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Dry air requirement for burning 1 Nm3 of CO to CO2 may be around _______________ Nm3 ?
A. 2.4
B. 1.75
C. 0.87
D. 11.4
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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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