Louisiana Air Brakes Practice Test
This is our Louisiana 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 governor switch stops between 75 to 90 psi. |
B | When pressure increases from 50 to 75 psi within three minutes. |
C | When pressure increases from 85 to 100 psi within 45 seconds. |
D | When the compressor shuts off between 70 to 90 psi. |
Question 2 |
A | remove fuel from the air lines |
B | evaporate any alcohol, which can damage the brake system |
C | remove oil from the air lines |
D | reduce the risk of ice in the air brake valves |
Question 3 |
A | coil, boots |
B | pressure valve, boots |
C | s-cam, shoes |
D | valve spring, shoes |
Question 4 |
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 parking brake system, service brake system, and emergency brake system. |
D | The service brake system, manual brake system, and disc brake system. |
Question 5 |
A | 125 |
B | 175 |
C | 150 |
D | 200 |
Question 6 |
A | When the brakes are hot. |
B | When the air pressure is low. |
C | When the temperature is below freezing. |
D | When the combined weight of your truckload and vehicle exceeds five tons. |
Question 7 |
A | True |
B | False |
Question 8 |
A | To let you know how much water is in the air tank. |
B | None of these. |
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 9 |
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 | Check your air pressure gauge and drive at highway speeds. |
D | Pump the brake pedal hard until you come to a stop. |
Question 10 |
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 11 |
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 12 |
A | Only if they are disc brakes. |
B | Only if they are drum brakes. |
C | No. |
D | Yes. |
Question 13 |
A | Once a week. |
B | Once a day. |
C | Every 1,000 miles. |
D | Before every trip. |
Question 14 |
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 15 |
A | springs that press the brakes on to stop the vehicle if the air brakes leak out |
B | specialized brakes only to be used during warm weather |
C | used for parking |
D | the spring that is attached to the brake pedal |
Question 16 |
A | air tank drain. |
B | governor. |
C | safety valve. |
D | application pressure gauge. |
Question 17 |
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 18 |
A | one, thirty |
B | three, sixty |
C | two, sixty |
D | one, sixty |
Question 19 |
A | compressed gas |
B | compressed air |
C | nitrogen and oxygen |
D | oxygen and helium |
Question 20 |
A | All of these. |
B | Something is malfunctioning, and you should have the vehicle checked by a mechanic. |
C | There is way too much air in the air compressor. |
D | The air pressure has exceeded 150 psi. |
Question 21 |
A | brake system |
B | hydraulic brakes |
C | storage tanks |
D | air tank drains |
Question 22 |
A | wedge |
B | shoe |
C | disc |
D | s-cam drum |
Question 23 |
A | Dust and water. |
B | Water and compressor oil. |
C | Dust and compressor oil. |
D | Compressed air does not contain any of these substances. |
Question 24 |
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 25 |
A | all of these. |
B | bolted securely to the wheels. |
C | used to hold the brake shoes and linings. |
D | located on either end of the vehicle's axles. |
← | 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 | evaporate any alcohol, which can damage the brake system |
B | reduce the risk of ice in the air brake valves |
C | remove oil from the air lines |
D | remove fuel from the air lines |
Question 2 |
A | When the governor switch stops between 75 to 90 psi. |
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 pressure increases from 50 to 75 psi within three minutes. |
Question 3 |
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 4 |
A | hydraulic brakes |
B | brake system |
C | storage tanks |
D | air tank drains |
Question 5 |
A | air tank drain. |
B | safety valve. |
C | application pressure gauge. |
D | governor. |
Question 6 |
A | Before every trip. |
B | Once a week. |
C | Once a day. |
D | Every 1,000 miles. |
Question 7 |
A | 125 |
B | 175 |
C | 150 |
D | 200 |
Question 8 |
A | compressed air |
B | oxygen and helium |
C | compressed gas |
D | nitrogen and oxygen |
Question 9 |
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 10 |
A | valve spring, shoes |
B | pressure valve, boots |
C | s-cam, shoes |
D | coil, boots |
Question 11 |
A | When the air pressure is low. |
B | When the brakes are hot. |
C | When the combined weight of your truckload and vehicle exceeds five tons. |
D | When the temperature is below freezing. |
Question 12 |
A | located on either end of the vehicle's axles. |
B | all of these. |
C | bolted securely to the wheels |
D | used to hold the brake shoes and linings. |
Question 13 |
A | The parking brake system, service brake system, and emergency 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 emergency brake system, parking brake system, and foundation brake system. |
Question 14 |
A | True |
B | False |
Question 15 |
A | To let you know how much water is in the air tank. |
B | None of these. |
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 16 |
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 17 |
A | activating the parking brake |
B | activating the emergency brake |
C | pushing down on the brake pedal |
D | letting up on the brake pedal |
Question 18 |
A | drain oil and moisture from the tank. |
B | prevent someone from moving the vehicle. |
C | completely empty air out of the tank. |
D | prevent them from freezing during cold temperatures. |
Question 19 |
A | Only if they are disc brakes. |
B | No. |
C | Only if they are drum brakes. |
D | Yes. |
Question 20 |
A | s-cam drum |
B | disc |
C | wedge |
D | shoe |
Question 21 |
A | one, thirty |
B | one, sixty |
C | three, sixty |
D | two, sixty |
Question 22 |
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 23 |
A | There is way too much air in the air compressor. |
B | The air pressure has exceeded 150 psi. |
C | Something is malfunctioning, and you should have the vehicle checked by a mechanic. |
D | All of these. |
Question 24 |
A | is only on automobiles with hydraulic brakes. |
B | is known as an official vehicle inspection. |
C | applies and releases the vehicle's brakes using the brake pedal. |
D | is only found on automobiles with hydraulic brakes. |
Question 25 |
A | specialized brakes only to be used during warm weather |
B | the spring that is attached to the brake pedal |
C | used for parking |
D | springs that press the brakes on to stop the vehicle if the air brakes leak out |
← | 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 Louisiana CDL Practice Test