Gas Fitter Test 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 455

What is the purpose of a draft hood in gas appliances?

To increase pressure inside the vent

To reduce the flue gas temperature

To maintain a proper airflow and prevent backdrafts

The purpose of a draft hood in gas appliances is to maintain proper airflow and prevent backdrafts. The draft hood functions by creating a connection between the appliance and the vent system, which allows for the safe exit of combustion gases while ensuring the appliance operates efficiently. By facilitating the proper flow of air, the draft hood helps to prevent flue gases from re-entering the appliance, which could pose safety hazards and lead to improper combustion.

Additionally, the draft hood works to stabilize the pressure within the vent system, which aids in the consistent operation of the gas appliance. Proper airflow enhances the combustion process and contributes to the safety and effectiveness of the appliance. This prevents backdrafts that can bring harmful gases into the living space, ensuring a safe and healthy environment.

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To aid in combustion efficiency

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