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Front #141
ABTH 102.15B
DP trains with a combined air flow rate greater than 60 CFM will not be allowed to operate over any descending or ascending grades greater than ___ percent that exceed ___ mile(s).
Answer: 2.0; 3Feedback: Although many of our DP trains operate with the 90 CFM Permanent Waiver, there are conditions where, if the combined air flow exceeds 60 CFM (similar to conventional trains), the train has restrictions.