Practice question

What is the purpose of Wheel Nut Indicators (Radmutternkappen / Pfeil-Zeiger) on heavy vehicle wheels?

To measure vehicle speed via optical sensors
To provide an instant visual cue during the daily walk-around check if any wheel nut has loosened, because paired indicator points will no longer point toward each other
To make the wheels look decorative
To balance the wheel dynamically

Answer: B — To provide an instant visual cue during the daily walk-around check if any wheel nut has loosened, because paired indicator points will no longer point toward each other

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