G2 Gas Fitter Practice Exam

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What device is installed to provide mechanical draft between the appliance and the vent termination?

Exhaust fan
Power venter
Venturi system
Draft inducer

The correct answer is: Power venter

The power venter is installed to provide mechanical draft from the appliance to the vent termination by using a fan to actively push flue gases out of the chimney or venting system. This is particularly important in situations where natural draft is insufficient to ensure proper venting, due to longer vent runs, vertical rise, or other obstructions that could impede the flow of combustion gases. The power venter helps maintain a proper flow rate, ensuring that hazardous gases are expelled safely from the appliance and that sufficient airflow is maintained for combustion. Other options may help with ventilation or airflow, but they do not serve the same specific function as a power venter. For instance, an exhaust fan typically draws air out of a space but does not specifically facilitate the venting of flue gases. A Venturi system utilizes the Venturi effect to induce a flow but is not primarily designed for mechanical draft. A draft inducer also assists in venting but may not provide the same level of forceful gas movement as a power venter, which is specifically designed for this purpose.