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Trailers the Forgotten Ones - Pt. 5

 

1.

Dollie brakes are unimportant and they need not be installed on the unit.

  1. True

  2. Flase

2.

If you had a failure of the air tank on the dollie while using the early model RE valve, which conditions(s) would occur?

  1. Supply line at the dollie would drain out the tank failure

  2. Supply line on the towed trailer would drain out the tank

  3. Towing vehicle supply line would drain out the tank failure

  4. All of the trailer parking brakes would dynamite

  5. All of the above

3.

The non-charging RE valve is used on today's dollies because of the need to protect the supply line to 70 psi.

  1. True

  2. Flase

4.

The dollies parking brakes are applied by:

  1. Dollies do not have parking capabilities

  2. Spring brakes

  3. Tank air delivered to the service chamber

5.

FMVSS-121 does not apply to dollies

  1. True

  2. False

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