How many whistle blows are needed to move the train backward?

How many whistle blows are needed to move the train backward?

• A. 1
• B. 2
• C. 3
• D. 4

Answer: (B)

Two whistle blows signal the crew to move the train backward. In mine rail safety, whistle codes use distinct counts to convey actions at a distance. A single blast is typically a warning or stop signal, while two blasts are reserved for directing the train to reverse. This provides a clear, unambiguous instruction to back up, giving the operator and crew time to ensure the track is clear and everyone is safe before the train moves.

Two whistle blows signal the crew to move the train backward. In mine rail safety, whistle codes use distinct counts to convey actions at a distance. A single blast is typically a warning or stop signal, while two blasts are reserved for directing the train to reverse. This provides a clear, unambiguous instruction to back up, giving the operator and crew time to ensure the track is clear and everyone is safe before the train moves.