Which of the following items should be inspected from outside a vehicle?

The correct answer is focused on the fuel system and lighting equipment, both of which can be inspected from outside the vehicle. Inspecting these components is vital for ensuring the vehicle's safety and functionality.

The fuel system, for example, includes lines, the gas cap, and sometimes visible parts of the tank that could show signs of leaks or damage when viewed from outside. Ensuring that this system is intact is crucial for preventing hazardous situations related to fuel leaks.

Similarly, lighting equipment such as headlights, taillights, brake lights, and turn signals can all be assessed without needing to access the interior of the vehicle. Functionality in these areas is essential for safety on the road, as they communicate the driver’s intentions and make the vehicle visible to others.

In contrast, tire tread depth can technically be measured from the outside, but a thorough assessment might require more than a visual check. The air conditioning system typically requires inspection from inside the vehicle, as functionality tests often need to be performed while the system is operating. Seats and seatbelts must also be checked from inside to evaluate their condition and functioning properly. These factors highlight why the fuel system and lighting equipment stand out as critical aspects that can be effectively evaluated from an external perspective.