Which code corresponds to the description 'Home relay ( slotting )'?

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Multiple Choice

Which code corresponds to the description 'Home relay ( slotting )'?

Explanation:
In signaling equipment coding, the two-letter code identifies the device type and its variant. A Home relay that uses a slotting mechanism is specifically encoded as HY, so HY is the match for “Home relay (slotting).” The other codes describe different components or variants that do not indicate a Home relay with slotting, so they don’t fit the description. In practice, technicians consult the code table to map these codes to the exact relay type and features, and seeing HY tells you immediately you’re dealing with the Home relay with the slotting variant.

In signaling equipment coding, the two-letter code identifies the device type and its variant. A Home relay that uses a slotting mechanism is specifically encoded as HY, so HY is the match for “Home relay (slotting).” The other codes describe different components or variants that do not indicate a Home relay with slotting, so they don’t fit the description. In practice, technicians consult the code table to map these codes to the exact relay type and features, and seeing HY tells you immediately you’re dealing with the Home relay with the slotting variant.

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