Permission of the train dispatcher is required to do which of the following actions with an electrically locked switch?

• A. Unlock an electrically locked switch
• B. Break the seal to operate the emergency release of an electrically locked switch
• C. Place a dual-controlled power-operated switch in hand position or operate in hand position
• D. All of the above

Answer: (D)

The key idea is that electrically locked switches are protected to prevent unsafe or unauthorized movement, and any action that bypasses that protection or moves the switch into manual control must have dispatcher authorization. Unlocking an electrically locked switch removes the protective lock, which could enable an unsafe or uncoordinated move. Breaking the seal to operate the emergency release bypasses the sealed control that ensures coordination with signals and other traffic, so permission is required to use it. Placing a dual-controlled power-operated switch in hand position or operating it by hand takes the switch out of automatic interlocking control, potentially affecting routing and signaling, and again requires dispatcher authorization to ensure safe, coordinated movements. Because these actions bypass or override protective safeguards, they all require the dispatcher’s permission.