1 . 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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2 . What is a bobtail tractor?

A tractor without a semi-trailer
A tractor with two semi-trailers
A tractor that travels faster than the speed limit
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3 . 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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4 . Combination vehicles need extra space on the road because they:

Drive more slowly than other commercial motor vehicles.
Are heavier than other commercial motor vehicles.
Need more space to turn and stop than other commercial motor vehicles.
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5 . Trailers built before ____ are not required to have spring brakes.

1985
1975
1999
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6 . 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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7 . To help prevent a rollover, cargo should be:

Placed as high as possible inside a trailer.
Placed as low as possible inside a trailer.
Placed on the driver’s side of a trailer.
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8 . 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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9 . Bobtail tractors are ____ to stop than tractors attached to full semitrailers.

Quicker
Easier
More difficult
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10 . When coupling a trailer:

Make sure to couple the proper glad hands.
Glad hands can be connected to any other glad hands.
Only one set of glad hands should be connected.
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11 . Combination vehicles are usually:

Easier to drive than single commercial vehicles.
Lighter than single commercial vehicles.
More difficult to drive than single commercial vehicles.
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12 . Combination vehicles:

Are usually shorter than single commercial vehicles.
Usually require less skill to drive than single commercial vehicles.
Usually require more skill to drive than single commercial vehicles.
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13 . 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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14 . When braking while pulling a trailer equipped with anti-lock brakes, you should:

Pump the brakes.
Use extra braking force to ensure the brakes kick in.
Brake as you would without anti-lock brakes.
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15 . If the emergency air line loses pressure:

The Anti-Lock Braking System will activate.
The service air line will activate.
The emergency brakes will activate.
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16 . 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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17 . The trailer hand valve:

Should always be used for parking.
Should only be used for parking on a downgrade.
Should never be used for parking.
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18 . To find out if a vehicle that was built before 1998 has an Anti-Lock Braking System (ABS), you can:

Pump the air brakes to activate the ABS.
Look into the back of the fifth wheel.
Check for wheel speed sensors coming from the back of the brakes.
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19 . The trailer hand valve should be used:

To test the trailer brakes.
To check the connection between the trailer and tractor.
To accelerate.
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20 . 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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