During balancing, after uneven protective coating is applied, which action may be necessary to achieve final balancing?

• A. Apply more coating to the heavier blade
• B. Apply more coating to the lighter blade
• C. Remove coating from both blades equally
• D. Apply more coating to the lighter blade

Answer: (D)

Balancing requires equal mass distribution across the blades. When the protective coating isn’t uniform, one blade becomes heavier and creates an imbalance. To correct this, you add weight to the lighter blade—by applying more coating—to bring the weights into equality. This targeted adjustment directly counteracts the uneven coating. Adding coating to the heavier blade would worsen the imbalance, and removing coating from both blades equally wouldn’t specifically fix the uneven distribution caused by the coating. After applying the extra coating to the lighter blade, re-check the balance and adjust as needed.