2026 Michigan DMV Combination Class A Test 1 (20 Questions And Complete Answers)
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Which of the following will not help prevent a rig from rolling over?
1. Keeping the cargo as close to the ground as possible
2. Driving slowly around turns
3. Driving on the shoulder of a road
1. Keeping the cargo as close to the ground as possible
2. Driving slowly around turns
3. Driving on the shoulder of a road
Driving on the shoulder of a road
When coupling, after you've connected the air lines to the trailer, you should:
1. Supply air to the trailer.
2. Activate the emergency brake.
3. Disconnect the glad hands.
1. Supply air to the trailer.
2. Activate the emergency brake.
3. Disconnect the glad hands.
Supply air to the trailer.
The ____ trailer is the most likely to turn over if a driver takes a turn too quickly.
1. Front
2. Last
3. Middle
1. Front
2. Last
3. Middle
Last
Combination vehicles need extra space on the road because they:
1. Drive more slowly than other commercial motor vehicles.
2. Are heavier than other commercial motor vehicles.
3. Need more space to turn and stop than other commercial motor vehicles.
1. Drive more slowly than other commercial motor vehicles.
2. Are heavier than other commercial motor vehicles.
3. Need more space to turn and stop than other commercial motor vehicles.
Need more space to turn and stop than other commercial motor vehicles.
When connecting a converter dolly to a second trailer, the trailer height should be ____ the center of the fifth wheel.
1. Level with
2. Slightly higher than
3. Slightly lower than
1. Level with
2. Slightly higher than
3. Slightly lower than
Slightly lower than
Trailers with low underneath clearance can present challenges when driving over:
1. Bridges.
2. Railroad tracks.
3. Overpasses.
1. Bridges.
2. Railroad tracks.
3. Overpasses.
Railroad tracks.
Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:
1. The trailer will stop normally.
2. The trailer will not have brakes.
3. The trailer will speed up.
1. The trailer will stop normally.
2. The trailer will not have brakes.
3. The trailer will speed up.
The trailer will not have brakes.
What is a bobtail tractor?
1. A tractor without a semi-trailer
2. A tractor with two semi-trailers
3. A tractor that travels faster than the speed limit
1. A tractor without a semi-trailer
2. A tractor with two semi-trailers
3. A tractor that travels faster than the speed limit
A tractor without a semi-trailer
If an air supply control is in its "emergency" position:
1. The vehicle will increase speed.
2. The trailer emergency brakes will be applied.
3. The air supply to the trailer will increase.
1. The vehicle will increase speed.
2. The trailer emergency brakes will be applied.
3. The air supply to the trailer will increase.
The trailer emergency brakes will be applied.
Keeping cargo low can:
1. Prevent a rollover.
2. Help you drive faster.
3. Make turns more dangerous.
1. Prevent a rollover.
2. Help you drive faster.
3. Make turns more dangerous.
Prevent a rollover.
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