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