CDL Combination Vehicles Practice Test 1
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Question 1 of 10
1. Question
A fully loaded rig is __ times more likely to roll over in a crash than an empty rig.
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Question 2 of 10
2. Question
When following behind other vehicles, you should follow
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Question 3 of 10
3. Question
A trailer jackknife is likely to happen when
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Question 4 of 10
4. Question
What is the fastest and best way to recognize that your trailer has started to skid?
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Question 5 of 10
5. Question
If your trailer begins to skid, you should
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Question 6 of 10
6. Question
Which of the following will help prevent a rollover:
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Question 7 of 10
7. Question
On the trailer air lines of a combination vehicle, the service line connects to the _________ on the trailer to control the pressure to the trailer brakes.
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Question 8 of 10
8. Question
On older trailers, what will happen if the emergency and service air lines are crossed?
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Question 9 of 10
9. Question
When hoses are not in use, why should the trailer gland hands be locked together or attached to dead end or dummy couplers?
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Question 10 of 10
10. Question
If the trailer protection valve malfunctions, which of the following may occur?
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