2026 Free Alabama DMV Class A CDL Combination Test 1 (20 Questions And Complete Answers)
1 / 20
Terms in this set
20
Bobtail tractors are ____ to stop than tractors attached to full semitrailers.
1. Quicker
2. Easier
3. More difficult
1. Quicker
2. Easier
3. More difficult
More difficult
Pull out the trailer air supply control to test:
1. The parking brake.
2. The trailer emergency brakes.
3. The trailer service brakes.
4. The landing gear.
1. The parking brake.
2. The trailer emergency brakes.
3. The trailer service brakes.
4. The landing gear.
The trailer emergency brakes.
When glad hands are coupled, the seals should be pressed together at a ____ angle.
1. 50-degree
2. 180-degree
3. 90-degree
1. 50-degree
2. 180-degree
3. 90-degree
90-degree
Before backing your tractor under the trailer, make sure your trailer brakes are:
1. Disengaged.
2. Locked.
3. Deactivated.
4. Dry.
1. Disengaged.
2. Locked.
3. Deactivated.
4. Dry.
Locked.
If a trailer begins to skid, the driver should:
1. Lock the brakes.
2. Release the brakes.
3. Steer in the opposite direction.
4. Accelerate.
1. Lock the brakes.
2. Release the brakes.
3. Steer in the opposite direction.
4. Accelerate.
Release the brakes.
While inspecting a coupling, you should go under the trailer and:
1. Detach the jaws from around the kingpin.
2. Make sure the locking lever is in the "emergency" position.
3. Remove the safety latch.
4. Look into the back of the fifth wheel.
1. Detach the jaws from around the kingpin.
2. Make sure the locking lever is in the "emergency" position.
3. Remove the safety latch.
4. Look into the back of the fifth wheel.
Look into the back of the fifth wheel.
A combination vehicle has:
1. One air line.
2. Two air lines.
3. Three air lines.
4. Four air lines.
1. One air line.
2. Two air lines.
3. Three air lines.
4. Four air lines.
Two air lines.
Compared to other commercial motor vehicles, combination vehicles need more space on the road because they are longer and they:
1. Need more space to turn and stop.
2. Drive more slowly.
3. Are twice the width.
4. Swerve more often.
1. Need more space to turn and stop.
2. Drive more slowly.
3. Are twice the width.
4. Swerve more often.
Need more space to turn and stop.
If a trailer begins to jackknife, the driver:
1. Should not apply the trailer hand brake.
2. Should firmly apply the brakes.
3. Can straighten the trailer with the parking brake.
1. Should not apply the trailer hand brake.
2. Should firmly apply the brakes.
3. Can straighten the trailer with the parking brake.
Should not apply the trailer hand brake.
Failure to keep the fifth wheel plate properly greased could:
1. Cause the trailer to disconnect.
2. Cause steering problems.
3. Cause braking problems.
4. Affect the lights.
1. Cause the trailer to disconnect.
2. Cause steering problems.
3. Cause braking problems.
4. Affect the lights.
Cause steering problems.
Showing the first 10 terms. Use the flashcard player above to study all 20 terms!