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In order to supply air to the air tanks of a second trailer, what should you do?

1) Connect the air hose from the first trailer to the second trailer.
2) Use a separate air compressor to fill the air tanks of the second trailer.
3) Open the air valves on the second trailer to allow air to flow into the tanks.
4) Disconnect the air hose from the first trailer and connect it to the second trailer.

Answer :

Final answer:

To supply air to the air tanks of a second trailer, you should connect the air hose from the first trailer to the second trailer, using the service and emergency lines. This ensures the air brake system functions correctly across both trailers.

Explanation:

In order to supply air to the air tanks of a second trailer, the best and most common practice is to connect the air hose from the first trailer to the second trailer. This is typically done using the service and emergency lines between trailers. The process works as follows:

  1. Ensure that both trailers are properly aligned and securely parked.
  2. Locate the emergency (usually red) and service (usually blue) air hose couplings on both trailers.
  3. Connect the emergency air line coupling from the first trailer to the corresponding coupling on the second trailer. This supplies air for the trailer brakes.
  4. Connect the service air line coupling from the first trailer to the corresponding coupling on the second trailer. This line controls the brake application on the second trailer.
  5. Check for any leaks or damage in the hoses and couplings.
  6. Once securely connected, the air compressor from the power unit (typically a truck) can now supply air to both trailers' air tanks, ensuring that the air brake system functions correctly across both trailers.

This method ensures that the brake system of both trailers is supplied with sufficient air pressure for safe operation, highlighting the critical importance of properly connected air lines in maintaining safe brake functionality across multiple trailers.

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