Final answer:
A critical lift is an operation that involves high risk, often exceeding a certain percentage of lifting equipment's rated capacity, which may vary by company or regulation.
Step-by-step explanation:
The term critical lift refers to a lift operation that involves particularly high risk. It might be due to the weight of the load, the complexity of the operation, or the presence of hazardous conditions. In engineering terms, especially in the context of crane operations or heavy lifting, a critical lift is typically one that exceeds 75% to 90% of the lifting equipment's rated capacity, but the exact definition can vary by company policy or regulatory guidelines. It could also be a lift involving an exceptionally valuable load, one that requires multiple cranes, or a lift in a confined space. Thus, the blank in the statement "A critical lift is one exceeding ________." would be filled with a specific percentage or condition that aligns with company policy or operational guidelines.