NFPA Liquefied Petroleum Gas Code (NFPA 58) Practice Exam

The correct choice highlights crucial safety practices in the installation of Type 1 clothes dryers regarding exhaust duct connections. Specifically, exhaust ducts for these dryers must not run through hazardous or unsuitable areas such as chimneys or crawl spaces. This is due to several safety and operational considerations.

Exhaust gases from clothes dryers can contain lint and moisture that may contribute to fire hazards or hinder proper ventilation if they enter environments not designed for this purpose. Chimneys are specifically designed for venting combustion gases from appliances, and using them for dryer exhausts could lead to obstruction or increased fire risk, as lint can accumulate and create a fire hazard. Additionally, crawl spaces often do not provide the necessary airflow, which can trap moisture and create conditions conducive to mold growth or further fire risks.

The other choices suggest scenarios that either directly conflict with established safety guidelines or imply permissible practices that could lead to unsafe conditions. For instance, running a duct through any enclosed space risks blockages and maintenance difficulties, which are contrary to best practices for dryer venting. Proper installation should ensure that exhaust ducts are visible, easily accessible for cleaning, and ideally vented directly outside.