How can you determine if the gauges in an aerial apparatus are functioning properly?

Determining if the gauges in an aerial apparatus are functioning properly requires verifying that they provide accurate readings during operational conditions. Starting the engine allows the gauges to activate, and observing their movement into normal ranges confirms their functionality. Each gauge is designed to monitor specific systems (like fuel, oil pressure, temperature, etc.) and should respond accordingly once the engine is running. This method effectively indicates whether the gauges are operational and provides real-time feedback on the apparatus's vital systems.

Visual inspection while the vehicle is parked may not reveal if the gauges are functioning correctly since they may not indicate any movement or provide any readings until the engine is started. Comparing them with a calibrated gauge can be useful in determining accuracy but would not be practical in a field situation without the proper equipment. Performing a manual test of each gauge might imply checking against known values, but this method is typically more time-consuming and may not provide the immediate operational insights needed during a pre-operation check.