2026 Illinois DMV Combination Class A Test 1 (20 Questions And Complete Answers)
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When driving a tractor-trailer equipped with ABS, you should:
1. Stop harder than you would otherwise.
2. Use extra braking force to ensure the ABS kicks in.
3. Brake as you normally would.
4. Brake using less pressure than you would otherwise use.
1. Stop harder than you would otherwise.
2. Use extra braking force to ensure the ABS kicks in.
3. Brake as you normally would.
4. Brake using less pressure than you would otherwise use.
Brake as you normally would.
The emergency air line:
1. Is controlled by the foot brake.
2. Is connected to the relay valves.
3. Supplies air to the trailer air tanks.
4. Prevents skids.
1. Is controlled by the foot brake.
2. Is connected to the relay valves.
3. Supplies air to the trailer air tanks.
4. Prevents skids.
Supplies air to the trailer air tanks.
Using the trailer hand brake while experiencing a trailer jackknife will:
1. Stop the skid.
2. Straighten the trailer.
3. Increase traction.
4. Continue the skid.
1. Stop the skid.
2. Straighten the trailer.
3. Increase traction.
4. Continue the skid.
Continue the skid.
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.
A trailer will be most likely to swing around when:
1. It is full.
2. Traveling in a straight line.
3. It is empty.
4. The wheels are rotating.
1. It is full.
2. Traveling in a straight line.
3. It is empty.
4. The wheels are rotating.
It is empty.
Which of the following types of vehicles is most prone to the “crack-the-whip" effect?
1. An automobile
2. A three-axle tractor
3. A bobtail tractor
4. A triple combination
1. An automobile
2. A three-axle tractor
3. A bobtail tractor
4. A triple combination
A triple combination
To test the trailer service brakes, you should:
1. Move the vehicle forward slowly and apply the brakes with the brake pedal.
2. Reverse the vehicle slowly and apply the brakes with the hand control.
3. Reverse the vehicle slowly and apply the brakes with the brake pedal.
4. Move the vehicle forward slowly and apply the brakes with the hand control.
1. Move the vehicle forward slowly and apply the brakes with the brake pedal.
2. Reverse the vehicle slowly and apply the brakes with the hand control.
3. Reverse the vehicle slowly and apply the brakes with the brake pedal.
4. Move the vehicle forward slowly and apply the brakes with the hand control.
Move the vehicle forward slowly and apply the brakes with the hand control.
Fully-loaded rigs:
1. Are less likely to roll over than empty rigs.
2. Are more likely to roll over than empty rigs.
3. Are just as likely to roll over as empty rigs.
4. Should not be driven.
1. Are less likely to roll over than empty rigs.
2. Are more likely to roll over than empty rigs.
3. Are just as likely to roll over as empty rigs.
4. Should not be driven.
Are more likely to roll over than empty rigs.
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.
To help prevent a rollover, cargo should be:
1. Placed as high as possible inside the trailer.
2. Placed as low as possible inside the trailer.
3. Placed on the passenger side of the trailer.
4. Placed on the driver’s side of the trailer.
1. Placed as high as possible inside the trailer.
2. Placed as low as possible inside the trailer.
3. Placed on the passenger side of the trailer.
4. Placed on the driver’s side of the trailer.
Placed as low as possible inside the trailer.
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