Final answer:
The governor allows the compressor to start pumping again when the air tank pressure falls to around 100 psi.
Step-by-step explanation:
True.
When the air tank pressure falls to around 100 psi, the governor allows the compressor to start pumping again. This is because as the air is used and the tank pressure decreases, the compressor needs to replenish the air in the tank to maintain a certain level of pressure.
For example, in vehicles with air brakes, the compressor is responsible for pressurizing the air tanks, which provide the necessary compressed air for the braking system to function effectively.