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