G2 Gas Fitter Practice Exam

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What is a common characteristic of appliances with induced draft systems?

  1. They utilize external air pressure

  2. They draw combustion gases away from the appliance

  3. They require a chimney

  4. They mix air at the combustion zone

The correct answer is: They draw combustion gases away from the appliance

Appliances equipped with induced draft systems are designed to efficiently manage the removal of combustion gases produced during operation. The primary function of an induced draft system is to create a negative pressure that helps to draw the combustion byproducts away from the combustion chamber and expel them outside through a venting system. This feature is crucial for preventing the buildup of harmful gases within the appliance and ensuring safe operation. Furthermore, by effectively removing combustion gases, these systems enhance overall combustion efficiency, which can lead to improved appliance performance and energy savings. This characteristic distinctly differentiates induced draft appliances from others that may rely on different methods of venting or gas management.

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