When a truck has no air pressure in its tanks,which warning devices are activated when the ignition key is turned on?

A) a buzzer
B) red light
C) a dash gauge
D) all of the above

Air Pressure

The force exerted by air, whether in a specific container or in the atmosphere, typically measured in pounds per square inch (PSI) or bar.

Warning Devices

Equipment or systems designed to alert or notify individuals of potential hazards or dangers.

Ignition Key

A key used to start a vehicle's engine by activating the ignition system.