Texas CDL General Knowledge Practice Exam

The statement about poor trailer ventilation causing cargo to catch fire is true. When there is inadequate ventilation in a trailer, heat and potentially flammable gases can build up, creating an environment where combustible materials can ignite. This is especially relevant for cargo that may contain flammable substances or materials that produce heat during transportation.

Understanding the importance of ventilation is crucial for preventing fires in cargo areas. Proper airflow can help dissipate heat and reduce the risk of ignition. This highlights the need for attention to trailer design and loading practices to ensure safety during transport.

The other statements contain inaccuracies or misleading information. For instance, incorrect fuel usage is indeed a known risk for fires, and engine overheating can certainly be a leading cause of vehicle fires. The assertion that properly secured cargo does not prevent fires overlooks how secure cargo can also reduce the risk of fire by preventing shifting and friction that might generate heat or sparks.