BDR associated cab code?

BDR associated cab code?

• A. 180 code
• B. 120 code
• C. 240 code
• D. 100 code

Answer: (B)

BDR relates to how brake demand signals are tied to the cab’s control and indication system. The associated cab code is the identifier the system uses to map the Brake Demand Relay’s signals to the correct cab, so brake commands and status readouts line up with the right crew’s controls. In SMT-1 practice, 120 code is the standard value used to indicate this BDR association, ensuring the cab signaling and braking logic interpret the BDR signals correctly. Other codes represent different cab configurations or non-BDR setups, so they wouldn’t correctly reflect the BDR’s association.

BDR relates to how brake demand signals are tied to the cab’s control and indication system. The associated cab code is the identifier the system uses to map the Brake Demand Relay’s signals to the correct cab, so brake commands and status readouts line up with the right crew’s controls. In SMT-1 practice, 120 code is the standard value used to indicate this BDR association, ensuring the cab signaling and braking logic interpret the BDR signals correctly. Other codes represent different cab configurations or non-BDR setups, so they wouldn’t correctly reflect the BDR’s association.