Which of the following best describes the restriction on performing maintenance actions early?

• A. Fifteen days / 5% maximum
• B. Sixty days / 20% maximum
• C. Ninety days / 25% maximum
• D. Thirty days / 10% maximum

Answer: (D)

This question tests how far in advance maintenance can be scheduled before its due date. The rule sets two caps for performing work early: you can be no more than 30 days ahead, and you can be no more than 10% ahead of the interval. In practice, you look at both limits and use the tighter one—the date that is the earlier of the two. For example, with a 120-day interval, 10% is 12 days, so you can schedule up to 12 days early (not 30). With a 350-day interval, 10% is 35 days, but you’re still limited to 30 days early, so 30 days is the earliest. This is why the restriction described is thirty days maximum and ten percent maximum.