How many units are required for an industrial rescue operation?

In the context of industrial rescue operations, the requirements typically emphasize the need for adequate personnel and resources that can effectively handle complex or hazardous situations. The correct choice indicates that two engines are necessary for an industrial rescue operation.

Having two engine companies provides a greater capacity for water supply and firefighting capabilities, which is crucial in an industrial setting where there may be large-scale incidents, such as chemical spills or fires involving heavy machinery. This increased number of engines allows for a strategic approach to manage incidents, ensuring that there are multiple streams of water available, and resources can be effectively distributed based on the evolving demands of the situation.

This choice reflects the need for a robust response structure in industrial environments, where risks are elevated, and stronger support is essential. The other options do not meet the operational needs in the same way, as a single command unit or a heavy rescue alone may not provide enough firefighting or rescue capacity, and while a truck and EMS unit are valuable resources, they do not address the core requirement for sufficient engine power in these situations.