Individual components tested as a lifting assembly must not be what?

The correct answer is that individual components tested as a lifting assembly must not be used independently. This is essential because each component in a lifting assembly is designed to work in conjunction with other components to safely and effectively lift loads. Testing components independently can lead to a misunderstanding of their performance characteristics and load-bearing capabilities when they are actually combined as part of a full assembly.

Using components independently may not accurately reflect their strength or functionality when under load, which could result in unsafe practices if these components are later used together without a proper understanding of their combined capacities. Furthermore, independent use could lead to situations where components are exposed to loads or stresses they were not designed to handle on their own.

The emphasis on integrated testing ensures that safety and reliability are maintained in lifting operations, which is a core principle of rigging and lifting practices outlined in training like NAVFAC P-307.