Which code indicates Distant signal light control?

• A. EM
• B. G
• C. DG
• D. D

Answer: (C)

Two-letter shorthand is used in signal maintenance to specify exactly what part of the system you’re working on. Distant signals warn the driver about what’s ahead, and the lighting for those signals is controlled separately from other signals. The code that represents distant signal light control is DG, a combination that clearly identifies the task of managing the distant signal’s lamps. This makes it the best choice because it uniquely matches the action of controlling the distant signal lights, avoiding ambiguity about which part of the system is involved. Other codes would refer to different components or omit the lighting aspect, so they wouldn’t specifically indicate distant signal light control.