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 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 2 |
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 3 |
A | False |
B | True |
Question 4 |
A | Once a day. |
B | Before every trip. |
C | Every 1,000 miles. |
D | Once a week. |
Question 5 |
A | Only if they are disc brakes. |
B | Yes. |
C | No. |
D | Only if they are drum brakes. |
Question 6 |
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 7 |
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 8 |
A | governor. |
B | air tank drain. |
C | safety valve. |
D | application pressure gauge. |
Question 9 |
A | When the governor switch stops between 75 to 90 psi. |
B | When pressure increases from 50 to 75 psi within three minutes. |
C | When the compressor shuts off between 70 to 90 psi. |
D | When pressure increases from 85 to 100 psi within 45 seconds. |
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 | You will instantly lose braking power. |
B | Your brakes will instantly lock up. |
C | Nothing will happen. |
D | You will still have some air pressure left in the air tanks. |
Question 12 |
A | s-cam, shoes |
B | pressure valve, boots |
C | valve spring, shoes |
D | coil, boots |
Question 13 |
A | remove oil from the air lines |
B | remove fuel from the air lines |
C | reduce the risk of ice in the air brake valves |
D | evaporate any alcohol, which can damage the brake system |
Question 14 |
A | one, thirty |
B | one, sixty |
C | two, sixty |
D | three, sixty |
Question 15 |
A | Safely bring the automobile to a stop while you still have control over the brakes. |
B | Check your air pressure gauge and drive at highway speeds. |
C | Pump the brake pedal hard until you come to a stop. |
D | Stay calm and wait for the air brakes to come on automatically. |
Question 16 |
A | disc |
B | shoe |
C | wedge |
D | s-cam drum |
Question 17 |
A | compressed air |
B | nitrogen and oxygen |
C | oxygen and helium |
D | compressed gas |
Question 18 |
A | 175 |
B | 150 |
C | 200 |
D | 125 |
Question 19 |
A | letting up on the brake pedal |
B | activating the emergency brake |
C | pushing down on the brake pedal |
D | activating the parking brake |
Question 20 |
A | the spring that is attached to the brake pedal |
B | springs that press the brakes on to stop the vehicle if the air brakes leak out |
C | used for parking |
D | specialized brakes only to be used during warm weather |
Question 21 |
A | air tank drains |
B | storage tanks |
C | hydraulic brakes |
D | brake system |
Question 22 |
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 23 |
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 24 |
A | is only found 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 on automobiles with hydraulic brakes. |
Question 25 |
A | All of these. |
B | The air pressure has exceeded 150 psi. |
C | Something is malfunctioning, and you should have the vehicle checked by a mechanic. |
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 | Your brakes will instantly lock up. |
B | You will still have some air pressure left in the air tanks. |
C | You will instantly lose braking power. |
D | Nothing will happen. |
Question 2 |
A | disc brake, parking brake systems |
B | service brake, emergency brake systems |
C | service brake, parking brake systems |
D | disc brake, emergency brake systems |
Question 3 |
A | is only found on automobiles with hydraulic brakes. |
B | is only on automobiles with hydraulic brakes. |
C | applies and releases the vehicle's brakes using the brake pedal. |
D | is known as an official vehicle inspection. |
Question 4 |
A | compressed gas |
B | oxygen and helium |
C | nitrogen and oxygen |
D | compressed air |
Question 5 |
A | hydraulic brakes |
B | air tank drains |
C | storage tanks |
D | brake system |
Question 6 |
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 | Check your air pressure gauge and drive at highway speeds. |
D | Pump the brake pedal hard until you come to a stop. |
Question 7 |
A | wedge |
B | s-cam drum |
C | shoe |
D | disc |
Question 8 |
A | prevent them from freezing during cold temperatures. |
B | completely empty air out of the tank. |
C | prevent someone from moving the vehicle. |
D | drain oil and moisture from the tank. |
Question 9 |
A | specialized brakes only to be used during warm weather |
B | used for parking |
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 10 |
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 11 |
A | False |
B | True |
Question 12 |
A | Every 1,000 miles. |
B | Before every trip. |
C | Once a week. |
D | Once a day. |
Question 13 |
A | safety valve. |
B | air tank drain. |
C | governor. |
D | application pressure gauge. |
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 | When the brakes are hot. |
B | When the combined weight of your truckload and vehicle exceeds five tons. |
C | When the air pressure is low. |
D | When the temperature is below freezing. |
Question 16 |
A | No. |
B | Yes. |
C | Only if they are drum brakes. |
D | Only if they are disc brakes. |
Question 17 |
A | coil, boots |
B | s-cam, shoes |
C | pressure valve, boots |
D | valve spring, shoes |
Question 18 |
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 19 |
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 20 |
A | There is way too much air in the air compressor. |
B | All of these. |
C | The air pressure has exceeded 150 psi. |
D | Something is malfunctioning, and you should have the vehicle checked by a mechanic. |
Question 21 |
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 22 |
A | Water and compressor oil. |
B | Dust and water. |
C | Dust and compressor oil. |
D | Compressed air does not contain any of these substances. |
Question 23 |
A | two, sixty |
B | one, thirty |
C | three, sixty |
D | one, sixty |
Question 24 |
A | 125 |
B | 150 |
C | 200 |
D | 175 |
Question 25 |
A | pushing down on the brake pedal |
B | activating the emergency brake |
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