Why does the air brake check on a triples combination generally take longer than on a single-trailer combination?

Pick an answer

1. Triples combinations use a faster-acting air system, so the check should actually take less time overall than usual for a driver
2. Each additional trailer and dolly adds its own set of connections and brakes that need to be confirmed working
3. The extra time is only for washing the trailers, not checking brakes
4. It doesn't take any longer since one check covers the whole combination at once

Correct!

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