The control switch for adding or removing air from the air ride bags is located:
  1. On the rear of the tractor, next to the fifth wheel
  2. On the bottom front of the trailer
  3. Inside the engine compartment
  4. Inside the tractor cab
Explanation
Answer: D - The control switch that is used to fill or drain air from the air ride bags is located inside the tractor cab. Using this switch, drivers can raise or lower the rear end of their tractors to fit under trailers. It is important that drivers always check to see if their fifth wheel will slide safely under the trailer before they attempt to back under the trailer. Failure to do so can result in damaged tractors and trailers.
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