1 . When backing up your tractor while coupling it to a trailer, the trailer brakes should be:

Deactivated.
Locked.
Unlocked.
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2 . A driver should test the tractor protection valve by:

Pulling the yellow, diamond-shaped knob.
Releasing air with the brake pedal.
Unlocking the trailer doors.
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3 . During a trip, the ____ should be open.

Rear service line shut-off valve
Rear supply line shut-off valve
Inner shut-off valves
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4 . Rollovers happen when:

You drive too slowly.
You are stopped.
You take a turn too fast.
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5 . Place the trailer air supply control in its "emergency" position to test:

The trailer emergency brakes.
A coupling device.
The anti-lock brakes.
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6 . If you press the tractor air supply control and your trailer's spring brakes do not release, you should:

Inspect the air line connections.
Activate the Anti-Lock Braking System.
Turn the engine off and on again.
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7 . A trailer that is too high:

May not couple correctly.
Will couple securely.
Is not an issue.
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8 . The emergency air line supplies air to the:

Relay valves.
Trailer air tanks.
Signal line.
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9 . What is a bobtail tractor?

A tractor without a trailer
A tractor attached to two trailers
A tractor with a tank
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10 . Trailers built before ____ are not required to have spring brakes.

1985
1975
1999
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11 . If a trailer begins to jackknife, the driver:

Should not apply the trailer hand brake.
Should firmly apply the brakes.
Can straighten the trailer with the parking brake.
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12 . Before a trip, you can make sure air flows to all trailers by:

Checking for moving air inside of each trailer.
Listening for air at the rear shut-off valve.
Feeling for air at the front shut-off valve.
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13 . A trolley valve:

Should be used while driving.
Should only be used to test trailer brakes.
Should be used when parking uphill.
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14 . Watching the road ahead:

Is more dangerous than only watching your mirrors.
Does not help you drive more safely.
Can help you avoid the need for sudden lane changes.
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15 . When backing up while coupling a trailer, the tractor should be positioned:

Directly in front of the trailer.
Directly next to the trailer.
Parallel with the trailer.
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16 . If your vehicle gets stuck on railroad tracks, you should:

Sit in the cab and call for help.
Exit the cab and walk away from the tracks.
Motion for another driver to push your vehicle.
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17 . The "crack-the-whip" effect can:

Turn over a trailer.
Be more effective than braking.
Make a truck move faster.
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18 . The best way to recognize that your trailer has started to skid is by:

Seeing other drivers' faces.
Checking the trailer in your mirrors.
Feeling the trailer move.
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19 . When testing ____, you should apply your vehicle's brakes with the hand control while moving the vehicle forward slowly.

The Anti-Lock Braking System
The emergency braking system
The trailer service brakes
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20 . During a trip, landing gear should be:

Completely raised.
Completely lowered.
Skimming the pavement.
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