🔗Alabama Combination Vehicles — Question 1 of 10
After you lock the kingpin into the fifth wheel, you should check the connection by:
Answer: C
Pulling the tractor ahead gently with the trailer brakes locked.
Upon locking the kingpin into the 5th wheel connector, slowly pull the tractor ahead with the trailer brakes locked to verify a secure connection.
Source: Alabama CDL Manual
All choices
- ABacking up with the trailer brakes released.
- BPulling forward 50 feet, turning right and then left.
- CPulling the tractor ahead gently with the trailer brakes locked.
Alabama CDL Combination Vehicles Test Info
Questions on Exam
20
Passing Score
80%
Time Limit
Typically 30 minutes; varies by testing location
Age Requirements
Intrastate: 18+ · Interstate: 21+
Alabama Law Enforcement Agency (ALEA)
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More CDL Combination Vehicles Practice Questions
- Glad hands are usually connecting which of these?
- Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer?
- After connecting the air lines but before backing under the trailer you should:
- The crack-the-whip effect is related to:
- Sudden turns or aggressive braking will have the greatest effect on which trailer?