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