National Commission for the Certification of Crane Operators (NCCCO) Mobile Crane Practice Exam

What percentage of the crane chart is recognized as a critical lift?

1. 50%

2. 70%

3. 75%

4. 80%

The correct answer is: 75%

A critical lift is defined as a lift that exceeds a certain percentage of the crane's rated capacity, often posing significant risk due to the load's weight, configuration, or the environment in which the lift is being performed. In many crane operations, a threshold of 75% of the crane's rated capacity is commonly recognized as the percentage that designates a lift as critical. When a lift reaches this 75% threshold, it requires additional planning, precautions, and possibly specialized protocols to ensure safety. This can include increased supervision, additional training for the operator, specific rigging techniques, and often a more detailed risk assessment. Recognizing that critical lifts involve significant risks, operators and their teams must take these factors into consideration to help prevent accidents and ensure the safety of personnel and equipment during the operation. This criterion is widely accepted within the industry to help maintain safety standards and protect all individuals involved in the lifting process.