This is our Delaware Air Brakes Practice Quiz and Practice Test compiled of 25 questions each. Each question is worth four points for a total of 100 possible points. A passing score is 80%.
The Air Brakes Practice Quiz reveals the correct answer during each question to help you study for the actual Air Brakes exam. The Air Brakes Practice Test doesn’t reveal the correct answers until the test is over.
The questions and answers are given in random order each time you retake the test. When you are finished testing, simply click on the “Get Results” button to see your test results. Clicking on the blue “List” button will reveal a list of all the questions you answered correctly and incorrectly. To take the test again, just refresh your browser window. It’s that easy.
Press the start button to begin your free Air Brakes Practice Quiz. Good luck!
What is a good indication that your truck's single brake system needs to be adjusted?
A
When the compressor shuts off between 70 to 90 psi.
B
When pressure increases from 50 to 75 psi within three minutes.
C
When pressure increases from 85 to 100 psi within 45 seconds.
D
When the governor switch stops between 75 to 90 psi.
Question 2
What will happen if your air compressor stops working?
A
You will still have some air pressure left in the air tanks.
B
Nothing will happen.
C
Your brakes will instantly lock up.
D
You will instantly lose braking power.
Question 3
In an air brake system, the air compressor pumps air into the ______.
A
brake system
B
storage tanks
C
hydraulic brakes
D
air tank drains
Question 4
What two substances usually found in compressed air are harmful to the brake system?
A
Dust and compressor oil.
B
Dust and water.
C
Compressed air does not contain any of these substances.
D
Water and compressor oil.
Question 5
The emergency brake system uses the ______ and the ______ to stop the vehicle during a brake system failure.
A
service brake, parking brake systems
B
disc brake, parking brake systems
C
disc brake, emergency brake systems
D
service brake, emergency brake systems
Question 6
Air tanks must be drained to:
A
prevent someone from moving the vehicle.
B
drain oil and moisture from the tank.
C
prevent them from freezing during cold temperatures.
D
completely empty air out of the tank.
Question 7
Spring brakes are ______.
A
specialized brakes only to be used during warm weather
B
the spring that is attached to the brake pedal
C
used for parking
D
springs that press the brakes on to stop the vehicle if the air brakes leak out
Question 8
The ______ forces the brake ______ away from each other and against the inside of the brake drum.
A
pressure valve, boots
B
coil, boots
C
valve spring, shoes
D
s-cam, shoes
Question 9
The supply pressure gauge is used for what purpose?
A
To let you know how much oxygen is in the air tanks.
B
None of these.
C
To let you know how much water is in the air tank.
D
To let you know how much diesel fuel is in the vehicle.
Question 10
Air brake systems are a combination of which three braking systems?
A
The disc brake system, drum brake system, and foundation brake system.
B
The service brake system, manual brake system, and disc brake system.
C
The emergency brake system, parking brake system, and foundation brake system.
D
The parking brake system, service brake system, and emergency brake system.
Question 11
Are front wheel brakes good under all conditions?
A
Only if they are drum brakes.
B
Only if they are disc brakes.
C
No.
D
Yes.
Question 12
The most common type of foundation brakes are ______ brakes.
A
wedge
B
shoe
C
s-cam drum
D
disc
Question 13
When should the parking brake not be used?
A
When the air pressure is low.
B
When the combined weight of your truckload and vehicle exceeds five tons.
C
When the brakes are hot.
D
When the temperature is below freezing.
Question 14
The air storage tanks are used to hold ______.
A
compressed air
B
compressed gas
C
oxygen and helium
D
nitrogen and oxygen
Question 15
When should the air tanks be drained?
A
Once a week.
B
Once a day.
C
Every 1,000 miles.
D
Before every trip.
Question 16
Some air brake systems are equipped with an alcohol evaporator. The purpose of the alcohol evaporator is to______.
A
remove oil from the air lines
B
remove fuel from the air lines
C
reduce the risk of ice in the air brake valves
D
evaporate any alcohol, which can damage the brake system
Question 17
Compressed air is let out of the system by ______.
A
pushing down on the brake pedal
B
activating the parking brake
C
letting up on the brake pedal
D
activating the emergency brake
Question 18
The service brake system:
A
is known as an official vehicle inspection.
B
applies and releases the vehicle's brakes using the brake pedal.
C
is only on automobiles with hydraulic brakes.
D
is only found on automobiles with hydraulic brakes.
Question 19
In a straight truck or passenger bus, with the engine off and the brakes released, air loss should not exceed ______ psi in ______ seconds.
A
two, sixty
B
one, sixty
C
one, thirty
D
three, sixty
Question 20
The safety valve in the air compressor tank should open at ______ psi.
A
200
B
150
C
175
D
125
Question 21
Vehicles equipped with air brakes are required to have a low air pressure warning signal. True or False?
A
False
B
True
Question 22
What should you do when you see the low pressure warning?
A
Check your air pressure gauge and drive at highway speeds.
B
Stay calm and wait for the air brakes to come on automatically.
C
Pump the brake pedal hard until you come to a stop.
D
Safely bring the automobile to a stop while you still have control over the brakes.
Question 23
The device that protects the tank and the rest of the air brake system from too much pressure is known as the:
A
governor.
B
air tank drain.
C
safety valve.
D
application pressure gauge.
Question 24
What does it mean when the safety valve releases air?
A
The air pressure has exceeded 150 psi.
B
Something is malfunctioning, and you should have the vehicle checked by a mechanic.
C
There is way too much air in the air compressor.
D
All of these.
Question 25
Brake drums are:
A
located on either end of the vehicle's axles.
B
all of these.
C
bolted securely to the wheels.
D
used to hold the brake shoes and linings.
Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results
There are 25 questions to complete.
←
List
→
Return
Shaded items are complete.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
End
Return
You have completed
questions
question
Your score is
Correct
Wrong
Partial-Credit
You have not finished your quiz. If you leave this page, your progress will be lost.
Correct Answer
You Selected
Not Attempted
Final Score on Quiz
Attempted Questions Correct
Attempted Questions Wrong
Questions Not Attempted
Total Questions on Quiz
Question Details
Results
Date
Score
Hint
Time allowed
minutes
seconds
Time used
Answer Choice(s) Selected
Question Text
All done
"Dude, Go Back to Truck Driving School" because you FAILED!
"A Bad Truck Driver" because you FAILED!
ad Truck Driver!"
"An Amateur Truck Driver" because you FAILED!
"A Good Truck Driver" because you PASSED!
"A Truck Driving Pro" because you PASSED!
Remember, the Air Brakes Practice Test doesn’t reveal the correct answers until the test is over. The questions and answers are given in random order each time you retake the test. When you are finished testing, simply click on the “Get Results” button to see your test results. Clicking on the blue “List” button will reveal a list of all the questions you answered correctly and incorrectly. To take the test again, just refresh your browser window.
Press the start button to begin your free Air Brakes Practice Test. Good luck!