Which feature serves as a visual indicator of system status through lights?

• A. Indicator Lights
• B. Coolant Pressure Cap
• C. Cab Lubrication Points
• D. Blower Motor Operation

Answer: (A)

Visual status through lights is provided by indicator lights. These are mounted on control panels to show, at a glance, how a system is performing—green for normal, yellow for caution, red for a fault—so operators can quickly assess conditions without digging through gauges. This makes it easier to spot issues and act promptly.

The coolant pressure cap is part of the cooling system and maintains pressure; it isn’t a visual status signal. Cab lubrication points are locations for applying lubricant and don’t convey system status. Blower motor operation indicates whether the blower is running, but it isn’t a general visual indicator of overall system status via lights.