Which components should be inspected for proper brake system function?

The correct choice entails inspecting brake chambers, breakaway devices, and vacuum reserve, as these are critical components that ensure proper function of a vehicle's brake system. Brake chambers play a vital role in the operation of air brake systems, converting air pressure into mechanical force to engage the brakes. Breakaway devices are safety features designed to enhance the reliability of the braking system, particularly in situations where the towing vehicle separates from the trailer. Lastly, the vacuum reserve is essential in vehicles with vacuum-assisted brakes, as it stores vacuum pressure needed for brake application.

Inspecting these components ensures that the braking system operates effectively and safely, minimizing the risk of brake failure. Each of these elements directly contributes to the ability of the vehicle to stop safely, making their checks essential for maintaining overall vehicle safety.

In contrast, options focusing on brake hoses, filter systems, and brake lights, or brake pads, tire pressure, and fluid reservoirs, while relevant in their context, do not address the core elements central to the brake system's fundamental operation. Similarly, evaluating brake rotors, wheels, and engine components includes some necessary checks but also diverges into matters not specifically critical to brake system function.