Red Seal Gasfitter — Class B Practice Exam

The increased risk of carbon monoxide poisoning is a significant hazard associated with poorly maintained gas appliances. When gas appliances are not properly maintained, they may not burn fuel efficiently, leading to incomplete combustion. This incomplete combustion can produce carbon monoxide, a colorless, odorless gas that is highly toxic and can be deadly if inhaled in sufficient quantities. Regular maintenance ensures that appliances function correctly and safely, reducing the likelihood of CO buildup and the associated health risks. On the other hand, while increased wear and tear, lower efficiency, and higher utility bills can all result from poor maintenance, they do not pose the same immediate and severe health risk as carbon monoxide poisoning. Therefore, the focus on carbon monoxide highlights the critical safety concerns related to gas appliances and underscores the importance of diligent maintenance.