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