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