How many air pressure gauges are monitored on the M1120?

Answer: B — Two

The M1120, which is a variant of the Heavy Expanded Mobility Tactical Truck (HEMTT), is equipped with two air pressure gauges that are monitored. These gauges are essential for monitoring the air pressure in the vehicle's air brake system. One gauge typically shows the pressure in the system as a whole, while the second gauge often indicates the pressure in the secondary system. This dual-gauge setup allows operators to ensure that the air brakes are functioning correctly and are within safe operating parameters, enhancing overall safety and operational readiness. The presence of just one gauge would not provide sufficient information about the dual systems in use, and having three or four gauges could lead to unnecessary complexity without adding practical value for the vehicle's operation. Therefore, the accurate monitoring of air pressure on the M1120 relies on having two effective gauges.