New York CDL Double/Triple Trailers Practice Test

Which statement is correct about secure rear trailer for the New York CDL doubles/triples test?

landing gear must be fully raised first all shut-off valves must be removed safety chains must be permanently disconnected before backing under the rear trailer, its brakes must be locked and/or wheels chocked

Correct Answer:

before backing under the rear trailer, its brakes must be locked and/or wheels chocked

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