CDL Doubles/Triples (T) Endorsement Test
Converter dollies: practice questions
Our CDL Doubles/Triples bank has 12 questions on this topic. Here are 4 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
How can you tell that a converter dolly has antilock brakes?
- It has a green lamp on the rear
- It has a red flag fixed to the end of the tow bar
- It has a yellow ABS lamp on the left side
- It has a blue glad hand
Show the answer
C. It has a yellow ABS lamp on the left side — These dollies will have a yellow lamp on the left side of the dolly (CDL Manual 7.1.8)
Question 2
A converter dolly joins which part of the rig to which?
- The landing gear to the trailer frame
- The tractor to the first trailer
- The rear of the first trailer to the front of the second trailer
- The tractor's fifth wheel to the tractor's own frame rails
Show the answer
C. The rear of the first trailer to the front of the second trailer — The converter dolly is hooked to the rear of the first semitrailer and pushed under the nose of the second semitrailer (CDL Manual 7.2.1)
Question 3
Which device on the first trailer holds the dolly's tow bar?
- The kingpin
- The glide plate
- The pintle hook
- The landing gear
Show the answer
C. The pintle hook — Hook dolly to front trailer. Lock pintle hook (CDL Manual 7.2.1)
Question 4
How many axles does a converter dolly have?
- One or two
- None; it slides on skids
- Four or more
- Exactly three
Show the answer
A. One or two — A converter dolly is a coupling device of one or two axles and a fifth wheel (CDL Manual 7.2.1)