1 . What does the tractor protection valve do?

Protects the tractor from being stolen
Protects the tractor from exceeding a set speed
Keeps air in the braking system, should the trailer break away or develop a leak
Ensures oil adequately lubricates the engine
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2 . When you are pulling a trailer, the air supply control lever should be in its ____ position.

Emergency
Supply
Normal
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3 . When driving a vehicle equipped with an Anti-Lock Braking System (ABS), brakes should be applied:

In the same way as they would be in a vehicle without ABS.
As the vehicle is placed in neutral.
With the hand brake.
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4 . Rearward amplification refers to:

The amount of noise projected to the rear of a vehicle.
The cause of the "crack-the-whip" effect.
The number of trailers that can be pulled by a tractor.
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5 . Keeping cargo centered on a rig can:

Help you drive faster.
Prevent a rollover.
Make turns more dangerous.
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6 . In a sudden turn, the ____ trailer is the most likely to turn over.

Front
Last
Middle
First
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7 . In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when:

Air pressure drops to a level between 20 and 45 psi.
You are experiencing a trailer jackknife.
Wheels have regained traction after a skid.
Air pressure is above 45 psi.
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8 . The trailer hand valve should not be used while you are driving because:

It will disconnect from the vehicle.
You will stop the vehicle too quickly.
It can cause a skid.
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9 . The trailer hand valve should be used:

To accelerate in rural areas.
Only to test the trailer brakes.
Together with the brake pedal.
On slippery surfaces.
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10 . Look into the back of the fifth wheel:

While testing your air brakes.
If your vehicle begins to skid.
When inspecting a coupling.
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11 . In a double or triple combination, the ____ trailer should be directly behind the cab.

Lightest
Heaviest
Smallest
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12 . Trailers built before ____ are not required to have spring brakes.

1985
1975
1999
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13 . Operating a combination vehicle usually requires ­­­­­____ operating a single vehicle.

Less skill than
About the same level of skill as
More skill than
Exactly the same level of skill as
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14 . Look for matching colors when coupling glad hands. Service lines are often:

Green.
Orange.
Red.
Blue.
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15 . A trailer that is too high:

May not couple correctly.
Will couple securely.
Is not an issue.
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16 . If a parked trailer does not have spring brakes, you should keep the trailer from moving by:

Having the vehicle parked against a wall or other vehicle.
Using chock blocks.
Parking on a slight incline.
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17 . When backing a trailer, you must first turn the steering wheel:

In the direction you want the trailer to go.
In the direction opposite of where you want the trailer to go.
To the left.
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18 . Simply changing lanes can cause:

A “crack-the-whip” effect, resulting in a rollover.
A trailer to straighten out.
Confusion over which lane the driver is hoping to use.
Other drivers to reduce their speed.
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19 . If a trailer begins to skid, it is best for the driver to:

Release the brakes.
Accelerate.
Quickly turn the steering wheel in one direction, then in the other.
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20 . In a combination rig, it is best to make:

Quick, sudden stops.
Sharp turns.
Quick accelerations.
Slow, planned stops.
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