Usually reacts well to hazards.

Is usually aware of what is happening around them.

Friction between the tires and road

The length of time needed to activate the brakes

Can help drivers see a larger area.

Cannot be used on vehicles transporting hazardous materials.

Require the driver to identify hazards well in advance.

Can swerve more easily than most other vehicles.

Should be driven 20 mph slower than posted speed limits.

Should not be driven in the rain.

Alabama CDL Double 1 - DMV Written Test Questions with Answers

Q.1

Before driving a vehicle with air brakes, you should ensure that the ____ come on automatically when air pressure falls below 45 psi.

Spring brakes
Parking brakes
Air brakes

Q.2

On any upgrade, gravity will:

Speed your vehicle up.
Slow your vehicle down.
Not impact your speed.

Q.3

Dollies equipped with ABS are required to have malfunction lamps located where?

On the rear
On the left side
On the front
On the top

Q.4

If using air tanks with manually operated drains, how often should you drain the tanks?

Every day
Once a week
Once a month
Once every 3,000 miles

Q.5

If an aggressive driver is involved in a crash down the road, you should:

Pull over and yell at them.
Stop after the crash scene and report the other driver’s behavior to police.
Block the driver in with your vehicle.

Q.6

How does doubling your speed from 20 mph to 40 mph affect your vehicle's braking distance?

It stays about the same.
It increases slightly.
It doubles.
It quadruples.

Q.7

A distracted driver:

Usually reacts well to hazards.
Usually has slowed perception.
Is usually aware of what is happening around them.
Is a good person to follow.

Q.8

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.

Q.9

What is traction?

Friction between the tires and road
Tires' rates of rotation
The length of time needed to activate the brakes

Q.10

The service air line is attached to the:

Relay valves.
Supply line.
Emergency air line.
Steering wheel.

Q.11

When it is difficult for others to see your vehicle, such as at dawn or dusk, you can help other drivers by:

Keeping your lights off.
Turning your lights on.
Driving on the shoulder.
Waving an arm out the window.

Q.12

If your brakes fail when traveling downhill, decide what to do as quickly as possible because:

The longer you wait, the faster your vehicle will go.
The longer you wait, the more vehicles will get out of your way.
The longer you wait, the slower your vehicle will go.

Q.13

Having ABS on only one axle:

Does not change braking in any way.
Is not possible.
Will allow the driver additional control over their vehicle when braking.
Will cause extra strain on the other axles.

Q.14

If federal inspectors judge your vehicle to be unsafe, they can:

Bring you to a garage to have your vehicle fixed.
Formerly request that you have your vehicle's problems fixed.
Call a mechanic.
Pull the vehicle out-of-service until it is fixed.

Q.15

Convex mirrors:

Cannot be used on vehicles transporting hazardous materials.
Are illegal in most states.
Can help drivers see a larger area.

Q.16

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.

Q.17

The suspension system:

Holds up the vehicle and its load.
Keeps the load the proper distance behind the driver’s compartment.
Maintains a safe distance between the vehicle and other vehicles.
Lightens the load for the tires.

Q.18

Doubles and triples:

Can swerve more easily than most other vehicles.
Should be driven 20 mph slower than posted speed limits.
Require the driver to identify hazards well in advance.
Should not be driven in the rain.

Q.19

To warn drivers behind you that you will be slowing down, you should:

Turn on the right turn signal followed by the left turn signal.
Tap your brake pedal a few times to illuminate your brake lights.
Swerve from side to side to get their attention.

Q.20

Pull out the trailer air supply control to test:

The parking brake.
The trailer emergency brakes.
The trailer service brakes.
The landing gear.