InstallationCâu 26 / 110
A high-efficiency condensing furnace (Category IV) is typically vented with what material?
a.Type B double-wall metal vent
b.Single-wall galvanized pipe
c.Listed PVC or CPVC plastic pipe
d.Masonry chimney only
Giải thích
Condensing furnaces cool flue gases below their dew point, producing acidic condensate and low-temperature exhaust, so they are vented with listed plastic pipe such as PVC or CPVC. Metal Type B vent would corrode and is not rated for positive-pressure condensing appliances. Manufacturer instructions specify approved materials and lengths.
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
- What is the primary purpose of providing combustion air to a gas-fired furnace?
- When two combustion-air openings are used for an appliance in a confined space communicating with outdoors, they are generally located how?
- Type B gas vent is designed to vent the products of combustion from which appliances?
- 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?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB C-20 Warm-Air HVAC Trade Exam · Quy trình kiểm tra