HVAC Journeyman Practice Exam

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What type of damper is not appropriate for use in vent connectors?

Automatically operated damper
Manually operated damper
Gear operated damper
All are acceptable

The correct answer is: Automatically operated damper

Using an automatically operated damper in vent connectors is typically not appropriate due to the need for venting systems to function reliably and predictably under varying conditions. Vent connectors must ensure a continuous and unobstructed flow of combustion gases away from appliances. An automatically operated damper could potentially close at inappropriate times, leading to a risk of backdrafting, poor ventilation, or even dangerous situations, such as carbon monoxide buildup. In contrast, manually operated dampers and gear-operated dampers allow for direct user control, making it easier to ensure that the venting remains open when necessary. These types of dampers are designed to remain in a set position, ensuring that adequate venting is achieved based on user needs and safety standards. Therefore, the concern with automatic dampers is their potential to fail or operate outside of expected parameters, making them unsuitable for such critical applications.