Which code is Power off stick relay?

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Study for the Signal Maintainer Test. Practice with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which code is Power off stick relay?

Explanation:
In signaling diagrams, relay identifiers are designed as compact mnemonics that tell you what kind of device you’re looking at and its condition. For a stick relay that is in the power-off state, the standard label uses three letters where P = Power, O = Off, and S = Stick. Put together, POS uniquely designates a Power Off Stick relay. The other options don’t fit this specific combination: they either suggest a different meaning (for example, Power On) or don’t map to the “stick” type at all, so they wouldn’t correctly label a power-off stick relay.

In signaling diagrams, relay identifiers are designed as compact mnemonics that tell you what kind of device you’re looking at and its condition. For a stick relay that is in the power-off state, the standard label uses three letters where P = Power, O = Off, and S = Stick. Put together, POS uniquely designates a Power Off Stick relay. The other options don’t fit this specific combination: they either suggest a different meaning (for example, Power On) or don’t map to the “stick” type at all, so they wouldn’t correctly label a power-off stick relay.

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