The operator must press the dead-man switch to change between the controller operation modes.

• A. True
• B. False
• C. Not Applicable
• D. Not Sure

Answer: (B)

The idea being tested is how safety interlocks relate to mode switching. A dead-man switch is a safety feature that requires the operator to be actively present to keep the system enabled; if the operator releases it, motion stops. It is not used to change the controller’s operating mode. Changing between modes is handled by a separate mode selector or control input, designed for selecting the desired mode without relying on the safety switch. Therefore, you don’t press and hold the dead-man switch to switch modes; the mode change is a distinct control action performed in a safe-state.