HVAC Journeyman Practice Exam

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What shape should the pit under the furnace be excavated if required clearance cannot be obtained?

  1. Rectangular

  2. Rounded

  3. 45-degree sloped

  4. Basin-like

The correct answer is: Basin-like

The pit under the furnace should be excavated in a basin-like shape to ensure proper drainage while providing adequate clearance for the furnace. This type of excavation design allows for water to naturally flow towards the lowest point, reducing the risk of pooling around the furnace. Additionally, it accommodates the necessary clearances for service and maintenance tasks, which is crucial for the safe and efficient operation of the HVAC system. A basin-like shape also helps prevent debris accumulation and can facilitate easier access for cleaning or inspection. This design effectively addresses both the functional and safety requirements associated with furnace installations.

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