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