2026 Free Arkansas DMV Class A CDL Combination Test 1 (20 Questions And Complete Answers)
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What is a tractor protection valve?
1. A valve to keep air in the brake system should there be a bad leak
2. A valve that prevents a truck from being stolen
3. A valve that prevents the driver from driving too fast
1. A valve to keep air in the brake system should there be a bad leak
2. A valve that prevents a truck from being stolen
3. A valve that prevents the driver from driving too fast
A valve to keep air in the brake system should there be a bad leak
In a combination rig, it is best to make:
1. Quick, sudden stops.
2. Sharp turns.
3. Quick accelerations.
4. Slow, planned stops.
1. Quick, sudden stops.
2. Sharp turns.
3. Quick accelerations.
4. Slow, planned stops.
Slow, planned stops.
What is off-tracking?
1. When a vehicle’s front wheels follow a different path than its rear wheels
2. When a vehicle's wheels all follow the exact same path
3. When a load shifts during a turn
4. When a vehicle's wheels run over a curb during a turn
1. When a vehicle’s front wheels follow a different path than its rear wheels
2. When a vehicle's wheels all follow the exact same path
3. When a load shifts during a turn
4. When a vehicle's wheels run over a curb during a turn
When a vehicle’s front wheels follow a different path than its rear wheels
When braking while pulling a trailer equipped with anti-lock brakes, you should:
1. Pump the brakes.
2. Use extra braking force to ensure the brakes kick in.
3. Brake as you would without anti-lock brakes.
1. Pump the brakes.
2. Use extra braking force to ensure the brakes kick in.
3. Brake as you would without anti-lock brakes.
Brake as you would without anti-lock brakes.
A driver should test the tractor protection valve by:
1. Pulling the yellow, diamond-shaped knob.
2. Releasing air with the brake pedal.
3. Unlocking the trailer doors.
1. Pulling the yellow, diamond-shaped knob.
2. Releasing air with the brake pedal.
3. Unlocking the trailer doors.
Releasing air with the brake pedal.
Pushing in the trailer air supply control will:
1. Supply the trailer with air.
2. Deactivate the air brakes.
3. Prevent the vehicle from skidding.
1. Supply the trailer with air.
2. Deactivate the air brakes.
3. Prevent the vehicle from skidding.
Supply the trailer with air.
When should the trailer hand valve be used?
1. Only when the trailer is carrying a load
2. Only to test the trailer’s brakes
3. Only in inclement weather when the trailer may skid
1. Only when the trailer is carrying a load
2. Only to test the trailer’s brakes
3. Only in inclement weather when the trailer may skid
Only to test the trailer’s brakes
What happens when the wheels of a trailer lock up?
1. The trailer will often continue to move in a straight line.
2. The trailer may disengage.
3. The trailer may swing around.
4. Steering will become easier.
1. The trailer will often continue to move in a straight line.
2. The trailer may disengage.
3. The trailer may swing around.
4. Steering will become easier.
The trailer may swing around.
During a trip, which shut-off valves should be open?
1. All shut-off valves should be open.
2. The rear shut-off valves should be open.
3. All shut-off valves should be in the open position, except the rear shut-off valves.
4. No shut-off valves should be open.
1. All shut-off valves should be open.
2. The rear shut-off valves should be open.
3. All shut-off valves should be in the open position, except the rear shut-off valves.
4. No shut-off valves should be open.
All shut-off valves should be in the open position, except the rear shut-off valves.
If your vehicle gets stuck on railroad tracks, you should:
1. Sit in the cab and call for help.
2. Exit the cab and walk away from the tracks.
3. Motion for another driver to push your vehicle.
1. Sit in the cab and call for help.
2. Exit the cab and walk away from the tracks.
3. Motion for another driver to push your vehicle.
Exit the cab and walk away from the tracks.
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