ANSWERS
How many cubic feet of air are required to burn one cubic foot of natural gas? - CORRECT
ANSWER✅✅✅10 ft3 (cubic feet)
How many cubic feet of air are required to burn cubic foot of propane gas? - CORRECT
ANSWER✅✅✅25 ft3 (cubic feet)
How many cubic feet of air are required to burn 1,000 BTUs of fuel gas? - CORRECT
ANSWER✅✅✅10 ft3 (cubic feet)
The by-products of complete combustion are: - CORRECT ANSWER✅✅✅carbon dioxide, water
vapor, and heat
How much water is produced when 100,000 BTUs of fuel gas is burned? - CORRECT ANSWER✅✅✅1
gallon
Ventless appliances require? - CORRECT ANSWER✅✅✅50 cubic feet of volume for every 1,000
BTUH
Air that is mixed with gas prior to combustion is called? - CORRECT ANSWER✅✅✅Primary air
What percentage of air is oxygen? - CORRECT ANSWER✅✅✅20%
The most dangerous by-product of incomplete combustion is? - CORRECT ANSWER✅✅✅carbon
monoxide
Aldehydes are an indication of? - CORRECT ANSWER✅✅✅incomplete combustion
Flue gas recirculation can be cause by? - CORRECT ANSWER✅✅✅An exhaust fan