Which of these is NOT a common job for which lockout and tagout is used?

Lockout and tagout procedures are critical safety protocols used to ensure that equipment is properly shut down and unable to be restarted until maintenance or servicing is completed safely. This is typically vital in situations involving machinery or electrical systems where unexpected re-energization could cause serious injury or death.

In the context of the question, the activity of performing sales activities does not involve handling equipment or machinery directly. It does not necessitate the need for lockout and tagout procedures, as these activities are not concerned with the operation or maintenance of equipment that could pose hazards if inadvertently activated. In contrast, repairing or testing circuits, freeing up jammed parts, and cleaning or lubricating machinery are all tasks that can involve risks associated with direct engagement with energized machinery.

Thus, understanding that lockout and tagout are primarily meant for maintenance and servicing operations clarifies why performing sales activities is not associated with these safety practices. The primary concern of lockout and tagout is to provide a safe working environment for those engaged in tasks that involve potential exposure to hazardous conditions related to equipment operation.