Why should the pintle hook connection between the first trailer and the converter dolly be inspected carefully after coupling?

Pick an answer

1. It only needs checking once a year, not after each coupling
2. Pintle hooks are only used for towing passenger vehicles, never for commercial trailers and never for any type of cargo trailer
3. The pintle hook has no safety function once initially connected
4. A poorly secured pintle hook connection can allow the dolly and second trailer to separate while driving

Correct!

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