How quickly can a type-H support system retract or raise the pendant?

The speed at which a type-H support system can retract or raise the pendant serves as a critical measure of its efficiency and operational capability. Selecting 1.5 seconds as the time frame for this action highlights a balance between quick responsiveness and the need for safety and precision in operation. Such timing allows for effective handling and adjustment during work, making it an optimal choice in various scenarios where rapid deployment and recovery of the pendant are necessary.

In contrast, the other options suggest either a much faster response than typically expected for a system designed for safety and usability, or they exceed reasonable limits that might compromise operation quality or safety checks. This nuanced understanding of operational capabilities is essential in fields where support systems play a vital role, such as in lift operations or similar applications.