What type of load can the MJ-40 and MHU-83 series lift truck handle with the fork adapter?

The MJ-40 and MHU-83 series lift trucks are specifically designed to handle heavy external stores, making this the correct choice. These trucks are equipped with fork adapters that allow for the efficient lifting and transporting of large and heavy munitions equipment, including bombs and missile systems, which are classified as heavy external stores in military terminology. Their construction focuses on stability and strength to manage these loads effectively on the flight line.

In contrast, the other options do not accurately represent the primary use case for these lift trucks. Vertical loads are typically managed by different types of equipment that are more suited for lifting in a vertical direction, and internal ammunition refers to munitions that are stored within an aircraft or vehicle, which would not be directly handled by lift trucks designed for external stores. Light components, while they might be lifted by such trucks, fall outside their primary operational design, which aims at handling more substantial and heavier weights.