Red Seal Gasfitter — Class A Practice Exam

What are the components of a gas venting system?

1. Regulator, shut-off valve, and combustion chamber

2. Gas meter, pressure gauge, and fan

3. Vent pipe, termination cap, and draft hood

4. Combustion air inlet, exhaust duct, and blower

The correct answer is: Vent pipe, termination cap, and draft hood

The components of a gas venting system are crucial for the safe and effective expulsion of combustion gases produced by gas appliances. The correct answer highlights the essential elements involved in venting these gases away from the appliance and the building. A vent pipe is designed to transport combustion gases from the appliance to the outside environment. It ensures that harmful gases, such as carbon monoxide, are safely expelled and do not accumulate in living spaces. The termination cap is placed at the end of the vent pipe and serves to prevent rain, snow, and debris from entering the system, while also allowing the gases to disperse effectively into the atmosphere. Additionally, the draft hood is a critical component that helps regulate the flow of combustion gases and prevents backdrafts, ensuring that the appliance operates safely and efficiently. Understanding these components emphasizes the importance of proper installation and maintenance of venting systems to promote safety and prevent hazardous situations resulting from gas buildup.