Which code is for train stop control stick relay?

• A. Vs
• B. Vj
• C. Wp
• D. Wz

Answer: (A)

Relays in signaling equipment are labeled with two-letter codes that identify their function. For a train stop control stick relay, the code that matches that function is the one where the first letter group covers train-stop related circuits and the second letter denotes the specific device or role within that group. The tag Vs aligns with the train stop control stick function, with the second letter “s” indicating the stick/stop control role. That’s why it’s the correct label for the train stop control stick relay.

The other codes point to different relays serving other parts of the signaling system and don’t correspond to the stop-control-stick function, which is why they aren’t correct for this particular device.