Which code is the Push button repeater stick relay?

• A. Po
• B. Pbs
• C. Pos
• D. Rg

Answer: (B)

In this signaling code, device identifiers are built from the key features of the equipment. A push button repeater stick relay is designated by reflecting its main parts in the code: Push button, repeater, and stick. The P stands for Push, and the letters b and s capture the remaining features (button and stick), forming the code Pbs. This combination uniquely names a push-button repeater stick relay, which is why it’s the correct choice.

The other codes point to different device types and don’t describe the same combination of features, so they don’t fit the designation for a push button repeater stick relay.