2026 Free Colorado DMV Combination Class A Test 2 (20 Questions And Complete Answers)
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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.
If unsure if a trailer is equipped with ABS, you can
1. Check under the trailer for wheel speed sensors coming from the back of the brakes.
2. Try driving on a slippery surface and see if ABS kicks in.
3. Assume it does have ABS.
4. Remove a tire and look for the ABS sensor on the axle.
1. Check under the trailer for wheel speed sensors coming from the back of the brakes.
2. Try driving on a slippery surface and see if ABS kicks in.
3. Assume it does have ABS.
4. Remove a tire and look for the ABS sensor on the axle.
Check under the trailer for wheel speed sensors coming from the back of the brakes.
To lower the risk of a rollover, you should:
1. Load the cargo as far forward as possible.
2. Load the cargo as far back as possible.
3. Load the cargo as low as possible.
4. Stack the cargo as high as possible.
1. Load the cargo as far forward as possible.
2. Load the cargo as far back as possible.
3. Load the cargo as low as possible.
4. Stack the cargo as high as possible.
Load the cargo as low as possible.
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.
Starting in which year were newly manufactured trailers required to have ABS?
1. 1972
2. 1987
3. 1998
4. 2004
1. 1972
2. 1987
3. 1998
4. 2004
1998
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.
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 tractor protection valve is:
1. A device that keeps air in the tractor or truck brake system, should the trailer break away or develop a bad leak.
2. A device that controls fuel levels.
3. A device that prevents theft.
4. A device that allows the battery to recharge efficiently.
1. A device that keeps air in the tractor or truck brake system, should the trailer break away or develop a bad leak.
2. A device that controls fuel levels.
3. A device that prevents theft.
4. A device that allows the battery to recharge efficiently.
A device that keeps air in the tractor or truck brake system, should the trailer break away or develop a bad leak.
After connecting the air lines to the trailer while coupling, you should
1. Supply air to the trailer.
2. Chock the wheels.
3. Inspect the fifth wheel.
4. Connect the electrical cord.
1. Supply air to the trailer.
2. Chock the wheels.
3. Inspect the fifth wheel.
4. Connect the electrical cord.
Supply air to the trailer.
The easiest way to recognize that your trailer has begun to skid is to:
1. Ask another driver.
2. Use your mirrors to determine if the trailer has left the lane.
3. Release the brake pedal and then push it down again.
4. Watch the jackknife warning light on the control panel.
1. Ask another driver.
2. Use your mirrors to determine if the trailer has left the lane.
3. Release the brake pedal and then push it down again.
4. Watch the jackknife warning light on the control panel.
Use your mirrors to determine if the trailer has left the lane.
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