1 . Rims with welding repairs:

Are not safe to be used.
Are acceptable on combination vehicles.
Are acceptable only when traveling at speeds under 40 mph.

2 . Which of the following is not a sign of tire failure?

A loud sound
Vibration
Smoother steering

3 . All trailers made after ____ must be equipped with Anti-Lock Braking Systems (ABS).

1943
1998
2009

4 . Which part of a combination vehicle is the most likely to turn over?

The tractor
The last trailer
All parts are equally as likely to turn over.

5 . A low air pressure warning signal should activate:

When tank pressure falls below 120 psi.
When tank pressure falls below 55 psi.
When tank pressure falls below 10 psi.

6 . A low air pressure warning signal:

Is not recommended on vehicles with air brakes.
Is required on vehicles with air brakes.
Is optional on vehicles with air brakes.

7 . Alcohol begins to affect the body:

After only one drink.
After several drinks have been consumed.
At the legal limit.

8 . You should maintain at least ____ of following distance per every 10 feet of your vehicle when you are traveling more slowly than 40 mph.

One second
Two seconds
Three seconds

9 . Which gas would cause concern due to a faulty exhaust system?

Oxygen
Carbon monoxide
Nitrogen

10 . Rust around wheel nuts may mean:

The nuts are too tight.
The nuts are loose.
The tires should be replaced.

11 . Which of the following is acceptable if found during a pre-trip inspection?

Tires of mismatched sizes
Tread of 3/32 of an inch in the grooves of the front tires
Tires manufactured by different makers
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12 . When driving a vehicle, rough acceleration is:

Encouraged at slow speeds.
Encouraged at all speeds.
Discouraged at all speeds.

13 . During a walk-around inspection, ensure the release arm is properly seated and the safety latch or lock is:

Engaged.
Deactivated.
Polished.

14 . Slow down and be extra careful:

When traveling in normal traffic.
When driving on dry pavement.
When approaching a work zone.

15 . When backing with a trailer, turning toward the driver’s side is encouraged because:

The driver will have the best possible view.
Power lines should be on the passenger's side.
Other drivers can offer assistance on the passenger's side.

16 . How many daily hours of sleep does an adult need to maintain alertness?

Six to seven
Seven to eight
Eight to nine
Four to five

17 . What does a vehicle inspection report do?

Tells the motor carrier about problems that may need fixing
Ensures that the vehicle is inspected regularly
Holds drivers accountable for inspecting the vehicle

18 . The leading factor resulting in death and injury in work zones is:

Speeding.
Stopping.
Under-inflated tires.

19 . Rust around wheel nuts may mean:

It recently rained.
The nuts are loose.
The tire is not clean.

20 . When drivers turn, they usually:

Look in the direction of the turn.
Look in the direction opposite the turn.
Look behind their vehicles.