The dolly tow bar may fly up Locking jaws closed on Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. Ensuring the safety of the public starts with a thorough 2. Doubles/Triples Air Brake Check - digital.ncdcr.gov 1/4 in. When the road is slippery The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. The number and size of air tanks varies among vehicles. Correct answer percentage. The dolly tow bar may fly away, possibly causing panic, and making it very difficult A converter dolly is If a converter dolly has spring brakes, you release the brakes by You have connected the converter dolly to the front semitrailer and then connected the rear semitrailer to the converter dolly. When you uncouple twin trailers, the last step is to Converter dollies You want to hook your combination to a second trailer that has no spring brakes. Which of the following will occur? Contributor: Luke Nold (Experienced truck driver for 5+ years and published writer for Fleet Magazine). High Road 2.0! D These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. C. fully raised, Which of these statements about speed management and braking is true? front of the second trailer. Refers to pulling two trailers at the same time, otherwise known as "pups" or "pup trailers" because they're only about 28 feet long. The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. fifth wheel, so trailer is raised slightly when dolly is pushed under it. 11 During normal operation the brakes of the double/triple trailer are controlled by: Unless you are draining the condensation out of the air tank, then the drain valve If the converter dolly is close to your semitrailer, you should wheel it into position? 0000001375 00000 n Then, the air loss from the leak will lower the air tank pressure quickly. Each trailer and converter dolly has one or more air tanks. 0000001107 00000 n 9. 1. You should keep at least ____ seconds of space ahead of you. Inspecting Doubles And Triples | High Road Online CDL Training
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