Illinois Air Brakes Practice Test
This is our Illinois 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!
Air Brakes CDL Practice Quiz
Question 1 |
A | s-cam drum |
B | disc |
C | shoe |
D | wedge |
Question 2 |
A | When the combined weight of your truckload and vehicle exceeds five tons. |
B | When the temperature is below freezing. |
C | When the brakes are hot. |
D | When the air pressure is low. |
Question 3 |
A | Your brakes will instantly lock up. |
B | Nothing will happen. |
C | You will instantly lose braking power. |
D | You will still have some air pressure left in the air tanks. |
Question 4 |
A | The parking brake system, service brake system, and emergency brake system. |
B | The emergency brake system, parking brake system, and foundation brake system. |
C | The disc brake system, drum brake system, and foundation brake system. |
D | The service brake system, manual brake system, and disc brake system. |
Question 5 |
A | nitrogen and oxygen |
B | oxygen and helium |
C | compressed air |
D | compressed gas |
Question 6 |
A | s-cam, shoes |
B | pressure valve, boots |
C | valve spring, shoes |
D | coil, boots |
Question 7 |
A | True |
B | False |
Question 8 |
A | reduce the risk of ice in the air brake valves |
B | evaporate any alcohol, which can damage the brake system |
C | remove oil from the air lines |
D | remove fuel from the air lines |
Question 9 |
A | Once a day. |
B | Before every trip. |
C | Every 1,000 miles. |
D | Once a week. |
Question 10 |
A | two, sixty |
B | one, thirty |
C | one, sixty |
D | three, sixty |
Question 11 |
A | Stay calm and wait for the air brakes to come on automatically. |
B | Safely bring the automobile to a stop while you still have control over the brakes. |
C | Check your air pressure gauge and drive at highway speeds. |
D | Pump the brake pedal hard until you come to a stop. |
Question 12 |
A | governor. |
B | application pressure gauge. |
C | safety valve. |
D | air tank drain. |
Question 13 |
A | Only if they are disc brakes. |
B | Yes. |
C | Only if they are drum brakes. |
D | No. |
Question 14 |
A | 150 |
B | 200 |
C | 175 |
D | 125 |
Question 15 |
A | activating the parking brake |
B | pushing down on the brake pedal |
C | activating the emergency brake |
D | letting up on the brake pedal |
Question 16 |
A | To let you know how much diesel fuel is in the vehicle. |
B | To let you know how much oxygen is in the air tanks. |
C | None of these. |
D | To let you know how much water is in the air tank. |
Question 17 |
A | springs that press the brakes on to stop the vehicle if the air brakes leak out |
B | used for parking |
C | specialized brakes only to be used during warm weather |
D | the spring that is attached to the brake pedal |
Question 18 |
A | Something is malfunctioning, and you should have the vehicle checked by a mechanic. |
B | All of these. |
C | The air pressure has exceeded 150 psi. |
D | There is way too much air in the air compressor. |
Question 19 |
A | disc brake, parking brake systems |
B | disc brake, emergency brake systems |
C | service brake, parking brake systems |
D | service brake, emergency brake systems |
Question 20 |
A | brake system |
B | storage tanks |
C | hydraulic brakes |
D | air tank drains |
Question 21 |
A | is only found on automobiles with hydraulic brakes. |
B | is only on automobiles with hydraulic brakes. |
C | applies and releases the vehicle's brakes using the brake pedal. |
D | is known as an official vehicle inspection. |
Question 22 |
A | prevent someone from moving the vehicle. |
B | drain oil and moisture from the tank. |
C | completely empty air out of the tank. |
D | prevent them from freezing during cold temperatures. |
Question 23 |
A | When the compressor shuts off between 70 to 90 psi. |
B | When pressure increases from 85 to 100 psi within 45 seconds. |
C | When the governor switch stops between 75 to 90 psi. |
D | When pressure increases from 50 to 75 psi within three minutes. |
Question 24 |
A | bolted securely to the wheels. |
B | located on either end of the vehicle's axles. |
C | used to hold the brake shoes and linings. |
D | all of these. |
Question 25 |
A | Compressed air does not contain any of these substances. |
B | Dust and water. |
C | Dust and compressor oil. |
D | Water and compressor oil. |
← | List | → |
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 |
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!
Air Brakes CDL Practice Test
Question 1 |
A | used to hold the brake shoes and linings. |
B | located on either end of the vehicle's axles. |
C | all of these. |
D | bolted securely to the wheels |
Question 2 |
A | applies and releases the vehicle's brakes using the brake pedal. |
B | is known as an official vehicle inspection. |
C | is only found on automobiles with hydraulic brakes. |
D | is only on automobiles with hydraulic brakes. |
Question 3 |
A | No. |
B | Yes. |
C | Only if they are drum brakes. |
D | Only if they are disc brakes. |
Question 4 |
A | valve spring, shoes |
B | coil, boots |
C | s-cam, shoes |
D | pressure valve, boots |
Question 5 |
A | Compressed air does not contain any of these substances. |
B | Dust and water. |
C | Dust and compressor oil. |
D | Water and compressor oil. |
Question 6 |
A | used for parking |
B | springs that press the brakes on to stop the vehicle if the air brakes leak out |
C | specialized brakes only to be used during warm weather |
D | the spring that is attached to the brake pedal |
Question 7 |
A | The service brake system, manual brake system, and disc brake system. |
B | The emergency brake system, parking brake system, and foundation brake system. |
C | The disc brake system, drum brake system, and foundation brake system. |
D | The parking brake system, service brake system, and emergency brake system. |
Question 8 |
A | remove fuel from the air lines |
B | evaporate any alcohol, which can damage the brake system |
C | reduce the risk of ice in the air brake valves |
D | remove oil from the air lines |
Question 9 |
A | Check your air pressure gauge and drive at highway speeds. |
B | Pump the brake pedal hard until you come to a stop. |
C | Safely bring the automobile to a stop while you still have control over the brakes. |
D | Stay calm and wait for the air brakes to come on automatically. |
Question 10 |
A | 200 |
B | 175 |
C | 150 |
D | 125 |
Question 11 |
A | safety valve. |
B | application pressure gauge. |
C | air tank drain. |
D | governor. |
Question 12 |
A | storage tanks |
B | hydraulic brakes |
C | air tank drains |
D | brake system |
Question 13 |
A | False |
B | True |
Question 14 |
A | Once a day. |
B | Every 1,000 miles. |
C | Before every trip. |
D | Once a week. |
Question 15 |
A | one, sixty |
B | one, thirty |
C | three, sixty |
D | two, sixty |
Question 16 |
A | prevent them from freezing during cold temperatures. |
B | completely empty air out of the tank. |
C | drain oil and moisture from the tank. |
D | prevent someone from moving the vehicle. |
Question 17 |
A | To let you know how much diesel fuel is in the vehicle. |
B | None of these. |
C | To let you know how much water is in the air tank. |
D | To let you know how much oxygen is in the air tanks. |
Question 18 |
A | service brake, parking brake systems |
B | service brake, emergency brake systems |
C | disc brake, emergency brake systems |
D | disc brake, parking brake systems |
Question 19 |
A | activating the parking brake |
B | letting up on the brake pedal |
C | pushing down on the brake pedal |
D | activating the emergency brake |
Question 20 |
A | When the air pressure is low. |
B | When the combined weight of your truckload and vehicle exceeds five tons. |
C | When the temperature is below freezing. |
D | When the brakes are hot. |
Question 21 |
A | oxygen and helium |
B | nitrogen and oxygen |
C | compressed gas |
D | compressed air |
Question 22 |
A | wedge |
B | s-cam drum |
C | shoe |
D | disc |
Question 23 |
A | When pressure increases from 85 to 100 psi within 45 seconds. |
B | When the governor switch stops between 75 to 90 psi. |
C | When the compressor shuts off between 70 to 90 psi. |
D | When pressure increases from 50 to 75 psi within three minutes. |
Question 24 |
A | Your brakes will instantly lock up. |
B | You will still have some air pressure left in the air tanks. |
C | You will instantly lose braking power. |
D | Nothing will happen. |
Question 25 |
A | The air pressure has exceeded 150 psi. |
B | There is way too much air in the air compressor. |
C | All of these. |
D | Something is malfunctioning, and you should have the vehicle checked by a mechanic. |
← | List | → |
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 |
Back to Illinois CDL Practice Test