What is the first step in PMCS after operating the vehicle?

The correct answer is checking the fluids as the first step in Preventive Maintenance Checks and Services (PMCS) after operating the vehicle. Verifying all fluids is crucial because it ensures that the vehicle is adequately lubricated and that essential systems, like the engine and transmission, have proper fluid levels. This step can help prevent potential issues that could lead to vehicle failure or reduced performance during operations.

Checking fluids should generally be performed immediately after the vehicle has been operated, as this is when the fluids will be at their operational temperature and will provide the most accurate readings. This ensures that any leaks or consumption issues can be diagnosed while the vehicle is still warm, making it easier to identify problems.

The other steps, such as inspecting air systems, checking tire tread, or cleaning the air filter, are also important parts of vehicle maintenance but are typically secondary to the immediate verification of fluid levels. Proper fluid checks help to establish a baseline for the vehicle's operational readiness, making it an essential first step in the PMCS process.