1 . A broken exhaust system:

Can allow poisonous fumes to enter the cabin.
Does not cause problems.
Should not be a concern.

2 . Regrooved tires are:

Allowed only on the front of a bus.
Allowed only on the rear of a bus.
Not allowed anywhere on a bus.

3 . 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.

4 . Regrooved tires:

Should not be used on any vehicle.
Should not be used on the front of a bus.
Should not be used on trucks hauling gravel.

5 . 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.

6 . A dual air brake system:

Consists of two separate air brake systems that share a single set of controls.
Is a single air brake system with two different sets of controls.
Consists of one air brake system for the left side of the truck and one system for the right side of the truck, each with its own set of controls.

7 . A low air pressure warning signal should activate:

When tank pressure falls below 120 psi.
When tank pressure falls below 60 psi.
When tank pressure falls below 10 psi.

8 . When inspecting your vehicle, you should check for all of the following, except:

Too much air pressure in your tires.
Too little air pressure in your tires.
A consistent name brand across all of your tires.

9 . What does the vehicle inspection report do?

Inform the motor carrier about problems that may need fixing
Ensure that the vehicle is inspected regularly
Keep people accountable for inspecting the vehicle

10 . When traveling down a hill, you can reduce the amount of required braking by:

Switching into a higher gear.
Switching into a lower gear.
Switching into neutral.

11 . If you don't pull a dolly out from beneath the rear trailer before unlocking the pintle hook:

The tow bar may fly up.
The kingpin may break.
The brakes may become unlocked.
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12 . How should you brake if your vehicle's ABS is not working?

Brake normally, as you will still have functioning brakes.
Pump the brake repeatedly.
Press the brake pedal down as hard as you can.

13 . 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.

14 . When passing a row of parked vehicles, a driver should:

Stay close to the vehicles.
Watch for signs of a person exiting a vehicle.
Flash their headlights.

15 . Lights that indicate that anti-lock brakes are not working are:

Gray.
Blue.
Yellow.

16 . When traveling down a downgrade, the speed of a vehicle will likely:

Decrease.
Stay the same.
Increase.

17 . The ____ are activated by an electric switch that is triggered by the brake pedal.

Headlights
Turn signals
Brake lights

18 . Which of the following will not help prevent a rig from rolling over?

Keeping the cargo as close to the ground as possible
Driving slowly around turns
Driving on the shoulder of a road

19 . When starting from a complete stop, a vehicle should:

Jerk forward.
Roll backwards.
Not move backwards.

20 . When driving under wet conditions, a lack of spray coming from the tires of other vehicles indicates that:

Ice has formed on the road.
The pavement is dry.
The spray is caught on the underside of the vehicle.