Take New Jersey CDL Air Brakes Test 2

QUESTION 1 / 25

Before driving a vehicle with air brakes, you should ensure that the spring brakes come on automatically when:

Choose one answer below.

AAir pressure falls below 45 psi.✓BAir pressure falls below 20 psi.✓CDriving downhill.✓DDriving uphill.✓

QUESTION 2 / 25

Foundation brakes are used:

Choose one answer below.

AOnly at the front wheels.✓BOnly at the rear wheels.✓COnly at the driver’s side wheels.✓DAt each wheel.✓

QUESTION 3 / 25

How should you test the low pressure warning signal?

Choose one answer below.

AEngage and disable the parking brake.✓BRapidly press and release the brake pedal.✓COpen the rear shut-off valves.✓DUncouple and recouple all glad hands.✓

QUESTION 4 / 25

Test the low pressure warning signal:

Choose one answer below.

AOnce a month.✓BOnce a week.✓CTwice a week.✓DBefore every trip.✓

QUESTION 5 / 25

When inspecting your brakes, a slack adjuster should move ____ from where it is attached to the push rod.

Choose one answer below.

AAt least three inches✓BMore than two inches✓CUp to five inches✓DNo more than one inch✓

QUESTION 6 / 25

The parking brake should be:

Choose one answer below.

AUsed whenever you park your vehicle.✓BUsed while driving.✓CSet when driving in bad weather.✓DRemoved.✓

QUESTION 7 / 25

Using an Anti-Lock Braking System (ABS):

Choose one answer below.

AShortens stopping distance.✓BShortens brake response time.✓CProvides less control.✓DProvides more control.✓

QUESTION 8 / 25

To inspect slack adjusters on S-cam brakes, you need to:

Choose one answer below.

APark on a hill and test the brakes.✓BPut on gloves and push in the slack adjusters.✓CRemove the drum and look inside.✓DChock the wheels and disengage the parking brake.✓

QUESTION 9 / 25

If the low pressure warning light comes on while you are driving:

Choose one answer below.

ABraking will only be possible if there is still enough air in the tanks.✓BYou can apply the brakes 14 times before the air in the system runs out.✓CYou should continue to drive normally and check the brake system when it is convenient.✓DYou should stay at least 100 feet away from other vehicles.✓

QUESTION 10 / 25

Water and compressor oil are usually found in the compressed air within an air brake system. Water and compressor oil:

Choose one answer below.

AAre necessary for the proper function of the air brake system.✓BShould be added if low.✓CShould be removed regularly.✓DAre not concerns.✓

QUESTION 11 / 25

Truck tractors with air brakes that were built on or after March 1, 1997 are equipped with:

Choose one answer below.

AAn extra set of brakes.✓BVoice-activated brakes.✓CCruise control.✓DAnti-Lock Braking Systems (ABS).✓

QUESTION 12 / 25

A tank endorsement is:

Choose one answer below.

AOnly required when transporting gases.✓BOnly required when transporting liquids.✓CRequired to transport both liquids and gases.✓DOptional when transporting hazardous materials.✓

QUESTION 13 / 25

If the spring brakes are activated, you should never:

Choose one answer below.

APush down the brake pedal.✓BOpen the hood.✓CRelease air from the air storage tanks.✓DOpen the door to the cab.✓

QUESTION 14 / 25

Brake fade is a result of:

Choose one answer below.

AExposure to sunlight.✓BExposure to moisture.✓CExcessive use.✓DNot using the brakes enough.✓

QUESTION 15 / 25

In a newer vehicle, you apply the parking brake:

Choose one answer below.

ABy using a diamond-shaped yellow knob.✓BBy using a round red knob.✓CBy using a square green knob.✓DBy using a black round knob.✓

QUESTION 16 / 25

The air compressor governor controls:

Choose one answer below.

AWhen the air compressor pumps air into the air storage tanks.✓BHow fast air is pumped into the air storage tanks.✓CThe temperature of air pumped into the air storage tanks.✓DThe speed of the vehicle.✓

QUESTION 17 / 25

What does the air compressor governor do?

Choose one answer below.

AControls when the air compressor pumps air into the air storage tanks.✓BControls how quickly air leaves the air storage tanks.✓CControls the temperature of the air entering the air storage tanks.✓DControls the temperature of the air leaving the air storage tanks.✓

QUESTION 18 / 25

Pressing and releasing a brake pedal unnecessarily can:

Choose one answer below.

ARelease air faster than it can be replaced.✓BAdd more air to the braking system.✓CMake the brake pedal more sensitive.✓DCreate a loud noise.✓

QUESTION 19 / 25

The air entering air storage tanks may contain:

Choose one answer below.

AWater and compressor oil.✓BFrost.✓CGravel.✓DAntifreeze.✓

QUESTION 20 / 25

The most common type of foundation brake used is the:

Choose one answer below.

AS-cam drum brake.✓BC-cam drum brake.✓CG-cam disc brake.✓DP-cam disc brake.✓

QUESTION 21 / 25

Most heavy-duty vehicles use:

Choose one answer below.

AMono air brake systems.✓BDual air brake systems.✓CTriple air brake systems.✓DQuadruple air brake systems.✓

QUESTION 22 / 25

Brakes can get out of adjustment:

Choose one answer below.

AIf they are hot.✓BDuring the winter.✓CIf they are used at all.✓DIf brakes on one side are used more often than brakes on the other side.✓

QUESTION 23 / 25

Air tank drains:

Choose one answer below.

AShould not be used in cold weather.✓BAre helpful to remove water and oil from the air tanks.✓CAre used to move air to the brakes.✓DClean the air in the passenger compartment.✓

QUESTION 24 / 25

The air storage tanks:

Choose one answer below.

AHold only enough air for one braking cycle.✓BHold enough air for brakes to be used several times if the compressor stops working.✓CDo not hold air unless there is an emergency.✓DHold enough air for more than 1,000 braking cycles.✓

QUESTION 25 / 25

A one-way check valve:

Choose one answer below.

ADrains the water and compressor oil from the air tanks.✓BPrevents air from escaping if the air compressor has a leak.✓CActivates the emergency brakes when there is a leak.✓DHolds the spring brakes in position until they are used.✓