1 . The minimum acceptable tread depth for rear tires is:

1/64 of an inch.
1/32 of an inch.
2/32 of an inch.

2 . When should mirror adjustments be made?

Before starting a trip
While driving
When a vehicle is stopped at a traffic signal

3 . When starting from a stop:

A vehicle should shift to the right.
A vehicle should be put into third gear.
A vehicle should not roll back.

4 . When approaching your vehicle as part of a pre-trip inspection, seeing fresh oil underneath the vehicle is:

A good sign.
Normal.
A cause for concern.

5 . If your vehicle gets stuck on railroad tracks, you should:

Sit in the cab and call for help.
Exit the cab and walk away from the tracks.
Motion for another driver to push your vehicle.

6 . When it’s difficult to see, such as at dawn or dusk, a driver can increase their vehicle's visibility by:

Driving while using their lights.
Driving with their windows open.
Flashing their lights periodically.

7 . Mirrors should be checked:

Before every lane change.
When changing lanes, but only when other vehicles are nearby.
When changing lanes, but only if it is dark outside.

8 . Before a tank is loaded:

The vehicle should be inspected by the driver.
The vehicle should be washed.
The vehicle should have its tires replaced.

9 . If mirrors are dirty before starting a trip:

They will likely become clean after driving a short distance.
It should not be a concern.
They should be cleaned before the vehicle is driven.

10 . On a slippery surface, stopping distance:

Is longer than on a regular driving surface.
Is not as long as on a regular driving surface.
Is about the same as on a regular driving surface.

11 . What is the number one cause of death and injury in a work zone?

Drivers speeding
Slow drivers
Animals crossing the road
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12 . The weight of a truck:

Usually has no impact on stopping distance.
Is a major factor affecting stopping distance.
Is not as important as the type of cargo in determining stopping distance.

13 . When starting a vehicle, warning lights and buzzers:

Should not light up or sound.
Should turn on and shut off quickly.
Should turn on and remain on.

14 . What helps prevent wheel lockup when braking?

An Anti-Lock Braking System (ABS)
Air brakes
An alternator

15 . What is a bobtail tractor?

A tractor without a trailer
A tractor attached to two trailers
A tractor with a tank

16 . Mirrors should be:

Checked only when changing lanes.
Checked frequently.
Checked only if there is a reason to suspect a problem.

17 . While driving, gauges are:

Unreliable.
Unpredictable.
To be monitored for potential signs of trouble.

18 . Dual tires should:

Always come into contact with one another.
Come into contact with one another fairly regularly.
Not come into contact with one another.

19 . What is often found in compressed air?

Water
Cardboard
Brake fluid

20 . A steering wheel should be:

Held with one hand while the other hand rests.
Held with both hands to ensure an adequate grip.
Released if the vehicle is approaching a bump.