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