InstallationCâu 23 / 110
What is the primary purpose of providing combustion air to a gas-fired furnace?
a.To cool the electronic controls
b.To supply oxygen for complete and safe fuel combustion
c.To increase supply air temperature
d.To reduce refrigerant pressure
Giải thích
A gas furnace needs adequate combustion air so the burner receives enough oxygen for complete combustion. Insufficient air causes incomplete combustion, producing carbon monoxide and sooting. The CMC specifies required openings or ducts based on the appliance input and the confining space.
Trích dẫn luật: 2022 California Mechanical Code (CMC)Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- When two combustion-air openings are used for an appliance in a confined space communicating with outdoors, they are generally located how?
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- Why must condensate from a condensing furnace or cooling coil be routed to an approved drain?
- A secondary condensate drain pan or float switch is typically required when an air handler is installed where?
- When brazing refrigerant copper line sets, dry nitrogen is flowed through the tubing to accomplish what?
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