Chapter 21.22 Oil Furnace Module
Questions And Answers With Verified
Solutions 100% Correct Rated A+
Fuel oils vary considerably. Generally they contain about ______ and ________. -
ANSWER✔✔85% Carbon (C) and 12% Hydrogen (H).
During combustion, ______ & ______ combine with the oxygen (O) in the air. -
ANSWER✔✔Carbon & Hydrogen.
What is produced from combustion when carbon and hydrogen combine with air? -
ANSWER✔✔Carbon dioxide (CO2) and water (H2O).
In fuel oils, a ___________ content is very important. - ANSWER✔✔Very low
Sulfur (S).
Fuel oil grades 1 & 2 are used in _______ & ______ furnaces. -
ANSWER✔✔Domestic & small commercial.
What is the most popular domestic fuel oil? - ANSWER✔✔Grade 2
Grade 2 fuel oil has about ________ Btu/gal. - ANSWER✔✔140,000
Besides carbon dioxide (CO2) & water being a product of combustion. What other
two products are present? - ANSWER✔✔Sulfur dioxide (SO2) & carbon
monoxide (CO).
, When perfect combustion takes place, about _____ of the flue gas volume is ____.
- ANSWER✔✔15%, CO2.
What is "Excess Air" in a oil furnace operation? - ANSWER✔✔Air which is
passing through the flue in excess of that needed for complete combustion.
The excess air fed to the firepot should be sufficient to produce ___________. -
ANSWER✔✔CO2 at about 10%.
How much excess air is used per gallon of oil? - ANSWER✔✔2000 ft3.
In what ways is combustion gases may be moved up the stack? - ANSWER✔✔By
natural convection, by forced draft, by induced draft.
Why is it important to keep flue gases warm? And what will happen if it's not? -
ANSWER✔✔Condensation will take place in the stack and flue. It will cause
severe corrosion.
What is one of the corrosion agents that occur if the flue gases are not kept warm?
- ANSWER✔✔Sulfurous Acid (H2SO3)
Describe a proper flame appearance: - ANSWER✔✔Is luminous, mainly yellow.
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