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