What is one requirement for the positioning of a lift truck during operation?

Answer: C — Must be parked on flat ground

The requirement for positioning a lift truck during operation is that it must be parked on flat ground. Positioning a lift truck on a stable and level surface is crucial for ensuring safe operation. Flat ground minimizes the risk of the truck tipping over or losing stability while hoisting materials or personnel. This stability is essential in preventing accidents and ensuring that the operator can maintain control of the lift truck throughout its operation. In contrast, positioning on busy roads can create hazards for both the operator and others on the road. Angling the truck towards traffic may expose the operator to unnecessary risk and is not a safety standard for operation. Operating in reverse mode is not inherently a requirement for the positioning of the lift truck; rather, it depends on the specific task at hand. Thus, the requirement for the truck to be parked on flat ground stands out as the most critical aspect for ensuring safety during operation.