2026 Free Colorado DMV Combination Class A Test 1 (20 Questions And Complete Answers)
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Large combination vehicles take the longest amount of time to stop:
1. When fully loaded.
2. When partially loaded.
3. When empty.
4. When mostly loaded.
1. When fully loaded.
2. When partially loaded.
3. When empty.
4. When mostly loaded.
When empty.
If you are operating a vehicle built before 1998 and are unsure if the trailer has an Anti-Lock Braking System (ABS), you can:
1. Check for wheel speed sensors coming from the back of the brakes.
2. Look for a red light on the front right corner of the converter dolly.
3. Pump the air brakes to activate the ABS.
4. Assume the vehicle has ABS.
1. Check for wheel speed sensors coming from the back of the brakes.
2. Look for a red light on the front right corner of the converter dolly.
3. Pump the air brakes to activate the ABS.
4. Assume the vehicle has ABS.
Check for wheel speed sensors coming from the back of the brakes.
Look for matching colors when coupling glad hands. Service lines are often:
1. Green.
2. Orange.
3. Red.
4. Blue.
1. Green.
2. Orange.
3. Red.
4. Blue.
Blue.
After coupling, there should be ____ between the upper and lower fifth wheel.
1. No space
2. Very little space
3. A lot of space
4. Three inches of space
1. No space
2. Very little space
3. A lot of space
4. Three inches of space
No space
To help prevent rollovers, you should:'
1. Accelerate quickly after stopping.
2. Drive slowly around turns.
3. Keep the load near the back of the trailer.
4. Keep the load on one side of the trailer.
1. Accelerate quickly after stopping.
2. Drive slowly around turns.
3. Keep the load near the back of the trailer.
4. Keep the load on one side of the trailer.
Drive slowly around turns.
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.
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.
Emergency air lines are often coded with the color:
1. Green.
2. Orange.
3. Yellow.
4. Red.
1. Green.
2. Orange.
3. Yellow.
4. Red.
Red.
Push in the trailer air supply control to:
1. Activate the emergency brakes.
2. Deactivate the air brakes.
3. Sound the horn.
4. Supply the trailer with air.
1. Activate the emergency brakes.
2. Deactivate the air brakes.
3. Sound the horn.
4. Supply the trailer with air.
Supply the trailer with air.
Fully-loaded rigs:
1. Are less likely to roll over than empty rigs.
2. Are more likely to roll over than empty rigs.
3. Should not be driven.
4. Are just as likely to roll over as empty rigs.
1. Are less likely to roll over than empty rigs.
2. Are more likely to roll over than empty rigs.
3. Should not be driven.
4. Are just as likely to roll over as empty rigs.
Are more likely to roll over than empty rigs.
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