Comments By Rob A.

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  • Rob A.
  • Joined:
  • 5 years ago
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Posted:  5 years ago

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Question about functional external light inspection.

Hi everyone,

New to the forum, but have been reading various threads for quite sometime to gain information about different topics.

In any event, I am taking my CDL class B road test in a few weeks (smaller model Mack dump truck; 22 feet in length; equipped with air brakes). I live out in Rhode Island.

My question is concerning the portion of the exam where you have to tell the examiner which lights you will be switching on from the cab, and you are relying on him/her to tell you they are properly functioning.

When performing the rear service brake light check, do you have to disengage the parking brake? Wouldn't that considered unsafe if the examiner is standing behind the vehicle and the parking brake is released? I'm only asking because I can remember reading how it is not good to apply the service brake while the spring brakes are engaged. What is the proper procedure for this?

EXTRA QUESTION When performing your in-cab air brake tests, testing for static and applied pressure leakage, does the ignition have to be completely switched to OFF, or does it have to be in the ACC/electrical position? Can the air gauges still work when the key is in the OFF position? Does this procedure vary state to state?

Thank you

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