Self-Test A-3.2 Calculating Air Requirements and Products of Combustion

Complete Self-Test A-3.2 and check your answers.

1. How many cubic feet of combustion air is required for every cubic foot of propane gas?
   1. 10 ft³ (0.28 m³)
   2. 16 ft³ (0.45 m³)
   3. 25 ft³ (0.71 m³)
   4. 32 ft³ (0.91 m³)

    

2. A volume of natural gas is burned to create 2,000,000 BTU/h of heat. The volume of carbon dioxide produced would be ______.
   1. 2,000 ft³
   2. 4,000 ft³
   3. 10,000 ft³
   4. 20,000 ft³

    

3. What do you call air that is premixed with the gas as it enters the burner?
   1. Excess
   2. Dilution
   3. Primary
   4. Secondary

    

4. A natural draft appliance has an input of 100,000 BTU/h. The appliance is designed to burn natural gas (C.V. 1,000 BTU/cubic feet). How much theoretic combustion air per hour will this appliance require?
   1. 500 ft³
   2. 1,000 ft³
   3. 1,500 ft³
   4. 3,000 ft³

    

5. A natural draft appliance has an input of 100,000 BTU/h. The appliance is designed to burn natural gas (C.V. 1,000 BTU/Cu.Ft.). How much excess air per hour will this appliance require?
   1. 500 ft³
   2. 1,000 ft³
   3. 1,500 ft³
   4. 3,000 ft³

    

Answer Key: Self-Test A-3.2 on next page.