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