What components make up power drive units (PDUs) used in cargo systems?

Power drive units (PDUs) play a crucial role in the operation of cargo systems within aircraft. The correct composition of these units is fundamental for their functionality in manipulating cargo movement effectively.

Electrical motors are the primary component in PDUs, providing the necessary power to drive the cargo handling equipment. They convert electrical energy into mechanical energy, enabling a wide range of operations, from lifting to moving cargo. The inclusion of rubber-coated rollers is also significant. These rollers not only facilitate the smooth movement of cargo during loading and unloading processes but also provide necessary grip and reduce the risk of damage to the cargo itself.

In contrast, other components mentioned in the various options do not accurately describe the makeup of PDUs. For instance, hydraulic pumps could be part of some systems, but they are not central to the typical design of PDUs used specifically in cargo systems. Similarly, pneumatic cylinders and steel cables have relevance in different contexts of aircraft operations but do not represent the main components of PDUs. Lastly, while electronic control panels and sensors are critical for managing various aircraft systems, they do not form the core physical structure of PDUs in cargo handling operations.

The combination of electrical motors with rubber-coated rollers ensures the effective and efficient operation of cargo systems, making this