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Question 1 of 13
1. Question
What is the most important thing to verify during worst-case combustion appliance zone (CAZ) testing?
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Question 2 of 13
2. Question
What is the most likely explanation if a backdrafting furnace begins to vent normally when a basement window is opened?
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Question 3 of 13
3. Question
What part of the building enclosure surrounds combustion heating equipment?
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Question 4 of 13
4. Question
Where is the proper sampling location for measuring carbon monoxide (CO) in an appliance equipped with a draft diverter?
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Question 5 of 13
5. Question
Which of the following would be least likely to affect chimney draft?
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Question 6 of 13
6. Question
Which of the following would be most likely to cause spillage or backdrafting?
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Question 7 of 13
7. Question
Which of the following materials is acceptable to vent a condensing furnace?
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Question 8 of 13
8. Question
What is a possible cause of CAZ depressurization when the furnace blower isn’t on?
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Question 9 of 13
9. Question
What pressure do we measure during a worst-case depressurization test?
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Question 10 of 13
10. Question
What is the last step in the worst-case depressurization test, among these choices?
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Question 11 of 13
11. Question
What depressurization cause can occur with the blower on or off or with the CAZ door open or closed?
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Question 12 of 13
12. Question
What do you do with the furnace filter to prepare for a worst-case depressurization test?
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Question 13 of 13
13. Question
Which of these is the very best solution to depressurized CAZs and spilling flue gases among these choices?
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