Which of the following is a requirement for truck safety equipment?

In the context of truck safety equipment, having a chemical fire extinguisher is particularly important for commercial vehicles, including taxicabs. Fire extinguishers are crucial for emergency situations, as they can help control and extinguish small fires before they escalate, providing an essential safety measure for both passengers and the driver.

While two functioning headlights, a rearview mirror, and a spare tire are also important safety features, they may not hold the same specific requirement in the context of all commercial vehicles as the fire extinguisher does in certain vehicle types like taxicabs. The presence of a chemical fire extinguisher ensures that drivers and passengers are better prepared to handle fire-related emergencies, which is vital for overall public safety and compliance with safety regulations. Understanding the specific safety requirements for different vehicles is crucial for effective operation and adherence to safety standards.