1 . 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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2 . Operating combination vehicles usually requires ­­­­­____ operating single vehicles.

Less skill than
About the same level of skill as
More skill than
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3 . 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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4 . To prevent a rollover, cargo should be:

Loaded with most weight on the driver’s side of the trailer.
Placed near the rear of the trailer.
Spread out in the trailer.
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5 . Pushing in the trailer air supply control will:

Supply the trailer with air.
Deactivate the air brakes.
Prevent the vehicle from skidding.
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6 . Having anti-lock brakes on only one axle:

Will not make a difference in braking.
Will provide increased control in braking.
Will likely cause the air brakes to malfunction.
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7 . Shut-off valves:

Prevent air from escaping air brake systems.
Prevent air from entering air brake systems.
Override vehicles that are out of control.
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8 . 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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9 . All trailers made after ____ must be equipped with Anti-Lock Braking Systems (ABS).

1943
1998
2009
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10 . When driving while pulling trailers, you should:

Make sudden turns with the steering wheel.
Avoid making sudden moves.
Push the accelerator to the floor when starting from a stop.
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11 . Trailers with low underneath clearance can present challenges when driving over:

Bridges.
Railroad tracks.
Overpasses.
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12 . If you are backing and the trailer begins to drift off-course, the driver should:

Return the steering wheel to the 12 o’clock position.
Turn the top of the steering wheel in the direction of the drift.
Turn the top of the steering wheel in the direction opposite of the drift.
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13 . Keeping cargo low can:

Prevent a rollover.
Help you drive faster.
Make turns more dangerous.
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14 . 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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15 . 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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16 . 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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17 . The tractor protection valve:

Ensures that oil adequately lubricates the engine.
Protects the tractor from exceeding a set speed.
Keeps air in the truck braking system if the trailer develops a leak.
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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 . During a trip, landing gear should be:

Completely raised.
Completely lowered.
Skimming the pavement.
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20 . Keeping cargo centered on a rig can:

Help you drive faster.
Prevent a rollover.
Make turns more dangerous.
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