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