1 . Avoid needing to make sudden lane changes by:

Using your horn to encourage other drivers to move out of your lane.
Only driving slower than the posted speed limit.
Watching the road ahead while driving.
Pulling off the road and waiting when there is high traffic.
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2 . Proper coupling technique:

Is the same on all vehicles.
Is essential to the safe operation of a vehicle.
Includes ensuring that the fifth wheel plate is not greased.
Can be learned over time.
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3 . 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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4 . Trailers built before ____ are not required to have spring brakes.

1985
1975
1999
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5 . After completing a pre-trip inspection, you should ensure that the:

Service line valve is closed.
Trailer hand brake is applied.
Emergency line valve is open.
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6 . Maintain a following distance of at least ____ for every 10 feet of your vehicle if you are traveling at a speed under 40 mph.

One second
Two seconds
Three seconds
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7 . When glad hands are coupled, the seals should be pressed together at an angle of:

30 degrees.
45 degrees.
60 degrees.
90 degrees.
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8 . In a double or triple combination:

Cargo weight must be evenly distributed between all trailers.
The heaviest trailer should be positioned directly behind the cab.
The heaviest trailer should be positioned in the rear.
The weight of the trailers does not matter.
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9 . When driving a bobtail tractor, you should be aware that:

Bobtails stop very easily.
Bobtails cannot drive as fast as tractors with semitrailers.
Bobtails are more difficult to stop than tractors with semitrailers.
Bobtails are illegal in most states.
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10 . Driving a combination vehicle ____ than driving a single vehicle.

Is easier
Requires more driving skill
Is better for training
Is safer in inclement weather
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11 . Keeping cargo low can:

Prevent a rollover.
Help you drive faster.
Make turns more dangerous.
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12 . After finishing a pre-trip inspection, you should:

Leave the rear shut-off valves open.
Remove the service line valve.
Close the emergency line valve.
Leave the emergency line valve open.
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13 . When backing up to couple a trailer, you should position the tractor:

At a 90-degree angle in front of the trailer.
Directly in front of the trailer.
At a 30-degree angle in front of the trailer.
At a 60-degree angle in front of the trailer.
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14 . The service air line is attached to the:

Relay valves.
Supply line.
Emergency air line.
Steering wheel.
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15 . Before beginning a trip, you should:

Leave the service line valve open.
Remove the relay valves.
Close the emergency line valve.
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16 . Keeping cargo centered on a rig can:

Help you drive faster.
Prevent a rollover.
Make turns more dangerous.
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17 . If an air supply control is in its "emergency" position:

The vehicle will increase speed.
The trailer emergency brakes will be applied.
The air supply to the trailer will increase.
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18 . 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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19 . 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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20 . All trailers made after ____ must be equipped with Anti-Lock Braking Systems (ABS).

1943
1998
2009
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