🚛CDL Doubles/Triples — Question 15 of 20
You are doing a walk around inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain values are ____ and the pintle hook is ____.
Answer: A
closed, latched
During the walk around inspection and checking the coupling areas of a double/triple trailer, the converter dolly air tank drain valve should be closed and the pintle hook should be latched.
All choices
- Aclosed, latched
- Bclosed, free
- Copen, free
CDL Doubles/Triples Test Info
Questions on Exam
20
Passing Score
80%
Time Limit
Typically 30 minutes; varies by testing location
The Doubles/Triples test content is federally standardized, so this question applies in every state. Age limits, fees, and testing procedures do vary — check your state's CDL requirements.
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More CDL Doubles/Triples Practice Questions
- You should check trailer height before connecting a converted dolly to a second or third trailer. The trailer height is right when:
- Which of these statements about quick steering movements and doubles/triples is true?
- You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should:
- With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. When you do this, you should hear:
- The purpose of a converter dolly is to: