New York CDL Double/Triple Trailers Practice Test

Which statement is correct about pintle hook hazard for the New York CDL doubles/triples test?

unlocking improves alignment never unlock the pintle hook with the dolly still under the rear trailer because the tow bar may fly up unlocking is required for a tug test unlocking drains the air tank

Correct Answer:

never unlock the pintle hook with the dolly still under the rear trailer because the tow bar may fly up

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