Which of the following is produced by differences in density between the gases within the vent conduit and the surrounding atmosphere?
A) draft
B) dilution air
C) natural draft
D) mechanical draft
Correct Answer:
Verified
Q6: Which of the following occurs when the
Q7: Which of the following are usually made
Q8: Which of the following is developed by
Q9: Which combustion control closes as soon as
Q10: When an appliance is _ vented, fresh
Q12: What type of air is supplied through
Q13: Which category of appliances are positive vent
Q14: Which of the following occurs when all
Q15: When does secondary air combine with gas?
A)before
Q16: Which category of appliances are nonpositive vent
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