Final answer:
The correct answer is C. Low pressure warning alarm/light. In an air brake system, this device indicates inadequate pressure.
Step-by-step explanation:
The correct answer is C. Low pressure warning alarm/light.
In an air brake system, the low pressure warning alarm or light is used to indicate inadequate pressure. The air brake system relies on compressed air to operate, and if the pressure drops below a certain level, it can result in reduced braking efficiency or even complete brake failure. The low pressure warning alarm or light alerts the driver to the low air pressure, allowing them to take appropriate action to prevent accidents.
For example, if the low pressure warning alarm activates while driving, the driver should safely bring the vehicle to a stop and address the issue before continuing.