2026 Idaho DMV Combination Test 1 (20 Questions And Complete Answers)
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When backing a trailer, you must turn the steering wheel:
1. In the direction you want the trailer to move.
2. In the direction opposite of where you want the trailer to move.
3. To the left until backing is complete.
1. In the direction you want the trailer to move.
2. In the direction opposite of where you want the trailer to move.
3. To the left until backing is complete.
In the direction opposite of where you want the trailer to move.
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.
After completing a pre-trip inspection, you should ensure that the:
1. Service line valve is closed.
2. Trailer hand brake is applied.
3. Emergency line valve is open.
1. Service line valve is closed.
2. Trailer hand brake is applied.
3. Emergency line valve is open.
Service line valve is closed.
If you are backing and the trailer begins to drift off-course, the driver should:
1. Return the steering wheel to the 12 o’clock position.
2. Turn the top of the steering wheel in the direction of the drift.
3. Turn the top of the steering wheel in the direction opposite of the drift.
1. Return the steering wheel to the 12 o’clock position.
2. Turn the top of the steering wheel in the direction of the drift.
3. Turn the top of the steering wheel in the direction opposite of the drift.
Turn the top of the steering wheel in the direction of the drift.
The trailer hand valve should be used:
1. To test the trailer brakes.
2. To check the connection between the trailer and tractor.
3. To accelerate.
1. To test the trailer brakes.
2. To check the connection between the trailer and tractor.
3. To accelerate.
To test the trailer brakes.
Shut-off valves:
1. Prevent air from escaping air brake systems.
2. Prevent air from entering air brake systems.
3. Override vehicles that are out of control.
1. Prevent air from escaping air brake systems.
2. Prevent air from entering air brake systems.
3. Override vehicles that are out of control.
Prevent air from entering air brake systems.
When backing up while coupling a trailer, the tractor should be positioned:
1. Directly in front of the trailer.
2. Directly next to the trailer.
3. Parallel with the trailer.
1. Directly in front of the trailer.
2. Directly next to the trailer.
3. Parallel with the trailer.
Directly in front of the trailer.
To help prevent a rollover, cargo should be:
1. Placed as high as possible inside a trailer.
2. Placed as low as possible inside a trailer.
3. Placed on the driver’s side of a trailer.
1. Placed as high as possible inside a trailer.
2. Placed as low as possible inside a trailer.
3. Placed on the driver’s side of a trailer.
Placed as low as possible inside a trailer.
What is a bobtail tractor?
1. A tractor without a trailer
2. A tractor attached to two trailers
3. A tractor with a tank
1. A tractor without a trailer
2. A tractor attached to two trailers
3. A tractor with a tank
A tractor without a trailer
In a double or triple combination, the ____ trailer should be directly behind the cab.
1. Lightest
2. Heaviest
3. Smallest
1. Lightest
2. Heaviest
3. Smallest
Heaviest
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