Which of the following should never be used as a point of contact when mounting or dismounting?

When mounting or dismounting from equipment, the controls should never be used as a point of contact due to safety concerns. Controls are designed for operating machinery and can be sensitive to unintended pressure or movement, which could lead to an accidental activation of the equipment. This presents a significant risk of accidents or injury, particularly if the machinery is inadvertently started while a person is still in the process of getting on or off.

In contrast, railings, steps, and pillars can often be used safely to provide stability and support when mounting or dismounting, as they are specifically designed to assist individuals in climbing on or off equipment securely. Using dedicated access points helps to maintain safety and prevents unnecessary injury while ensuring effective operation of the equipment.