1 . Trailers built before 1975 are:

Required to have spring brakes.
Not required to have spring brakes.
Unsafe to drive.
Prohibited from public roadways.
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2 . When the wheels of a trailer lock up:

The trailer will stay straight.
The trailer tends to swing around.
The cab will swing, but the trailer will stay straight.
They will likely go flat.
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3 . The trailer hand valve:

Should always be used for parking.
Should only be used for parking on a downhill.
Should never be used for parking.
Should only be used when transporting cargo.
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4 . During a trip, landing gear should be:

Completely raised.
Completely lowered.
Skimming the pavement.
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5 . If a load is placed on one side of a trailer, the trailer:

May lean, and could result in a rollover.
May add extra support during turns.
Have improved braking.
Have improved steering.
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6 . If colors are being used to distinguish glad hands, which color is used for emergency lines?

Orange
Yellow
Blue
Red
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7 . If the emergency air line loses pressure:

The service brakes will activate.
The tractor protection valve will close.
The rear trailer will detach from the combination.
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8 . When backing a trailer, you must turn the steering wheel:

In the direction you want the trailer to move.
In the direction opposite of where you want the trailer to move.
To the left until backing is complete.
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9 . 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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10 . When a combination vehicle goes around a corner:

The turn should be made as tightly as possible.
The front and rear wheels move in different paths.
The rear wheels should run over the curb.
It is acceptable for street signs to be knocked over if they are too close to the road.
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11 . When coupling, after you've connected the air lines to the trailer, you should:

Supply air to the trailer.
Activate the emergency brake.
Disconnect the glad hands.
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12 . When a vehicle goes around a corner, the rear wheels:

Follow the same path as the front wheels.
Follow a different path than the front wheels.
Should not be a concern to the driver.
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13 . If a trailer begins to jackknife, you should not:

Release the brakes.
Apply the trailer hand brake.
Allow the wheels to grip the road.
Allow the trailer to straighten out.
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14 . Rollovers happen when:

You drive too slowly.
You are stopped.
You turn too quickly.
You plan an escape route.
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15 . 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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16 . When driving a combination rig, following distance should be:

Decreased in poor weather.
Shorter than when driving a single vehicle.
About the same as when driving a single vehicle.
Longer than when driving a single vehicle.
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17 . If colors are being used to distinguish glad hands, which color is used for service lines?

Orange
Yellow
Green
Blue
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18 . 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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19 . A tractor protection valve is:

A device that keeps air in the tractor or truck brake system, should the trailer break away or develop a bad leak.
A device that prevents theft.
A device that controls fuel levels.
A device that allows the battery to recharge efficiently.
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20 . When a combination vehicle goes around a corner:

The vehicle must use at least two lanes.
The front and rear wheels will move in different paths.
It is best to allow the rear wheels to drive over the curb.
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