Engineer Training

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Front #148

ABTH 103.5

The independent brake must not be applied while power or dynamic brakes are being used, except: (Select all that apply.)

To control wheel slips at speeds below 10 mph
To control wheel slips at speeds above 10 mph
When starting or stopping, and speed is below the effective range of the dynamic brakes
When starting or stopping, and speed is above the effective range of the dynamic brakes

Back #148

Flag

ABTH 103.5

Answer: - When starting or stopping, and speed is below the effective range of the dynamic brakes - To control wheel slips at speeds below 10 mph

Feedback:
Use dynamic brakes to their fullest extent before supplementing with the independent brakes. Extended range dynamic brakes typically lose their effectiveness at speeds of five mph and lower. For wheel slips, don't use the independent brakes at speeds of 10 mph or above. If the brake cylinder box on the screen flashes yellow, it indicates that brake cylinder pressure is building up while traveling at 10 mph or faster.