Practice Quiz

Commercial Driver's License

Category - Emergencies

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If driving a commercial vehicle with air brakes and the low air pressure warning light comes on, drivers should:
  1. Use controlled braking technique for stopping.
  2. Continue to nearest maintenance facility.
  3. Continue to monitor warning light to see if it goes out.
  4. Pull over and stop as quickly as safely possible.
Explanation
Answer: D - When driving a commercial vehicle that has air brakes and the low air pressure warning light comes on, drivers should pull over and stop as quickly as safely possible. It is important to get the vehicle off the road and completely stopped as soon as the driver is able to do so in this emergency situation. The warning light indicates a possible loss of air pressure in the tanks that could lead to complete failure of the braking system. Continued use of the vehicle should not be attempted until the problem has been identified and resolved.
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