2026 Free Alaska DMV Class A Combination Test 1 (20 Questions And Complete Answers)
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Before beginning a trip, you should:
1. Leave the service line valve open.
2. Remove the relay valves.
3. Close the emergency line valve.
1. Leave the service line valve open.
2. Remove the relay valves.
3. Close the emergency line valve.
Close the emergency line valve.
A tractor protection valve:
1. Keeps air in a brake system if there is a bad leak.
2. Prevents a truck from being stolen.
3. Prevents a trailer from being accidentally released.
1. Keeps air in a brake system if there is a bad leak.
2. Prevents a truck from being stolen.
3. Prevents a trailer from being accidentally released.
Keeps air in a brake system if there is a bad leak.
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
If the emergency air line loses pressure:
1. The Anti-Lock Braking System will activate.
2. The service air line will activate.
3. The emergency brakes will activate.
1. The Anti-Lock Braking System will activate.
2. The service air line will activate.
3. The emergency brakes will activate.
The emergency brakes will activate.
When driving a vehicle equipped with an Anti-Lock Braking System (ABS), brakes should be applied:
1. In the same way as they would be in a vehicle without ABS.
2. As the vehicle is placed in neutral.
3. With the hand brake.
1. In the same way as they would be in a vehicle without ABS.
2. As the vehicle is placed in neutral.
3. With the hand brake.
In the same way as they would be in a vehicle without ABS.
Maintain a following distance of at least ____ for every 10 feet of your vehicle if you are traveling at a speed under 40 mph
1. One second
2. Two seconds
3. Three seconds
1. One second
2. Two seconds
3. Three seconds
One second
The service air line is often controlled by the foot brake and is attached to the ____ valves.
1. Relay
2. Supply
3. Emergency
1. Relay
2. Supply
3. Emergency
Relay
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
Combination vehicles:
1. Often have taller trailers than single commercial vehicles.
2. Are usually lighter than single commercial vehicles.
3. Require more skill to drive than single commercial vehicles.
1. Often have taller trailers than single commercial vehicles.
2. Are usually lighter than single commercial vehicles.
3. Require more skill to drive than single commercial vehicles.
Require more skill to drive than single commercial vehicles.
The trailer hand valve:
1. Should always be used for parking.
2. Should only be used for parking on a downgrade.
3. Should never be used for parking.
1. Should always be used for parking.
2. Should only be used for parking on a downgrade.
3. Should never be used for parking.
Should never be used for parking.
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