A typical tractor unit needs how many seconds to clear a single track of a railroad?
- 5 seconds.
- 8 seconds.
- 14 seconds.
- 20 seconds.
At what psi will the tractor protection valve close?
- 80-95 psi.
- 60-85 psi.
- 100-125 psi.
- 50-75 psi.
- 20 to 45 psi.
Controlled braking is only possible _________.
- If performed by a bad driver.
- During the warm weather.
- While enough air remains in the air tanks.
- If the air storage tank has oil in it.
How often should alcohol containers be checked during cold weather?
- Every month.
- Every week.
- Every five hours.
- Every two weeks.
- Every day.
If the air compressor is belt-driven, you should ________.
- Check the condition only.
- Check the tightness of the belt only.
- Check the weather forecast.
- Check the condition and the tightness of the belt.
