1 . Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:

The trailer will stop normally.
The trailer will not have brakes.
The trailer will speed up.
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2 . If a load is placed on one side of a trailer, the trailer:

May lean during turns.
May add extra support during turns.
May be easier to steer during turns.
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3 . Fully-loaded rigs:

Usually are very responsive to steering.
Are more likely to roll over than empty rigs.
Can stop quickly.
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4 . During a trip, landing gear should be:

Completely raised.
Completely lowered.
Skimming the pavement.
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5 . What does an Anti-Lock Braking System (ABS) do?

It allows a vehicle's wheels to lock up.
It prevents a vehicle's wheels from locking up.
It makes turning a vehicle easier.
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6 . 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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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 . Keeping cargo low can:

Prevent a rollover.
Help you drive faster.
Make turns more dangerous.
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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 the wheels of a trailer lock up:

The trailer will be drivable.
The trailer may swing around.
The vehicle will maintain steering.
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11 . 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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12 . If color-coded, which color is used to identify emergency, or supply, lines?

White
Yellow
Red
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13 . When coupling:

You can assume all vehicles are the same.
Be sure that you are coupling correctly.
Cracks in the mounting are acceptable.
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14 . What is the Johnson bar?

A hand valve that works the trailer brakes
A valve that indicates the fuel level
A valve that limits the amount of cargo
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15 . 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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16 . 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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17 . When should the trailer hand valve be used?

Only when the trailer is carrying a load
Only to test the trailer’s brakes
Only in inclement weather when the trailer may skid
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18 . 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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19 . 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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20 . When coupling a trailer, you should:

Couple together the proper glad hands.
Couple glad hands with any other glad hands.
Leave one pair of glad hand loose.
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