Prevent air from escaping air brake systems.

Prevent air from entering air brake systems.

Override vehicles that are out of control.

Requires a longer stopping distance than a full truck.

Requires a shorter stopping distance than a full truck.

Takes the same distance to stop as a full truck.

Hawaii CDL Double 1 - DMV Written Test Questions with Answers

Q.1

When braking with ABS, you should:

Push the brake pedal harder than usual.
Push the brake pedal as you normally would.
Push the brake pedal more lightly than usual.

Q.2

Keeping cargo centered on a rig can:

Help you drive faster.
Prevent a rollover.
Make turns more dangerous.

Q.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.

Q.4

When traveling down a steep downgrade:

The air brakes should be used.
The vehicle should be placed in a low gear and the driver should use engine braking.
The driver should continually downshift instead of using the brakes.

Q.5

Anti-Lock Braking Systems (ABS):

Reduce a vehicle's normal braking capacity.
Are in addition to other braking systems and do not reduce a vehicle's braking power.
Are not effective on larger vehicles.

Q.6

What is removed when an air tank is drained?

Water and oil
Ammonia
Liquid cleaners

Q.7

If you remain in neutral for too long while switching gears:

The vehicle will speed up.
You may have trouble putting the vehicle into the next gear.
You may kill the engine.

Q.8

When attaching more than one semi-trailer to your tractor, you should place:

The lightest semi-trailer at the very end of the combination.
The heaviest semi-trailer at the very end of the combination.
Any trailer in any position in the combination.

Q.9

Eating while driving is:

A good way to save time.
A dangerous activity.
Acceptable if you are eating foods that are easy to eat.

Q.10

If you have an engine fire, you should:

Open the hood as soon as possible.
Turn off the engine as soon as possible.
Not use a fire extinguisher.

Q.11

When leaving your vehicle unattended:

The parking brake should be used.
The parking brake only needs to be used if the vehicle is parked on a slope.
The parking brake should not be used, as it can damage the tires.

Q.12

Shut-off valves:

Prevent air from escaping air brake systems.
Prevent air from entering air brake systems.
Override vehicles that are out of control.

Q.13

A driver should use the trailer hand valve to:

Uncouple the trailers.
Test the trailer brakes.
Apply the emergency brakes.

Q.14

When traveling on a downgrade, your vehicle will:

Slow down.
Travel at the same rate as on level roadway.
Speed up.

Q.15

Drivers trapped behind a slow-moving vehicle often:

Follow the vehicle too closely.
Allow the vehicle plenty of space.
Are happy with the speed of travel.

Q.16

An after-trip inspection should be done:

Once a week.
Once a month.
After every trip.

Q.17

If confronted by an aggressive driver, you should:

Make eye contact to better communicate with them.
Ignore their gestures.
Not move out of their path of travel.

Q.18

In a dual air brake system:

Air tanks are shared between both systems.
Each system has its own air tanks.
You must designate which system you are using.

Q.19

If an air compressor is belt-driven, the belt should be routinely checked to ensure that it is:

Thin.
Properly tightened.
Cracked.

Q.20

An empty truck:

Requires a shorter stopping distance than a full truck.
Requires a longer stopping distance than a full truck.
Takes the same distance to stop as a full truck.