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ABTH 103.4

A crew on a conventional train is traveling at 30 mph in throttle position 4 and is approaching a railroad crossing at grade (diamond). When may the engineer advance the throttle to a position higher than notch 4?

  1. Once the leading wheels pass over the railroad crossing at grade (diamond)
  2. Once the lead locomotive passes over the railroad crossing at grade (diamond)
  3. Once the entire locomotive consist passes over the railroad crossing at grade (diamond)
  4. Once the entire train passes over the railroad crossing at grade (diamond)
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ABTH 103.4


Answer: Once the entire locomotive consist passes over the railroad crossing at grade (diamond)
Feedback:
Most railroad crossings at grade are not smooth. Waiting to advance the throttle after the locomotive consist passes over will help to prevent any sort of surge and make for better train handling.