Which code corresponds to Negative track lead to track transformer?

• A. Tp
• B. Ttbx
• C. Ttcx
• D. Ug

Answer: (C)

Understanding these codes hinges on recognizing that the prefix T marks track-related items, and the following letters indicate the specific device and its lead polarity. The description “Negative track lead to track transformer” points to a lead that goes to a track transformer with the negative polarity. In this code scheme, the suffix cx is used to denote a transformer connection with the negative lead. So the code that encodes a track transformer connection with negative polarity is the one that ends in cx, i.e., Ttcx. The other options describe different track-related functions: Tp points to a positive track lead, Ttbx refers to another track-related component, and Ug is not a track-transformer lead. Focusing on the suffix that signals a transformer connection with negative polarity allows you match the description to the correct code.