A mast moment indicator above 77% requires what action to be taken?

• A. 75%
• B. 76%
• C. 78%
• D. 77%

Answer: (D)

The key idea here is understanding how safety readings use a threshold to decide when to act. A mast moment indicator tracks the loads on the mast, and the procedure is to take corrective measures whenever the reading goes beyond a defined limit. That boundary is 77 percent. So as soon as the indicator exceeds 77 percent, you should carry out the prescribed action. The other numbers aren’t defining the trigger itself; they’re just different readings, while 77 percent sets the point at which action must begin. The main point to grasp is that actions are tied to crossing a specific limit, and in this case that limit is 77 percent.