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 | Check your air pressure gauge and drive at highway speeds. |
B | Pump the brake pedal hard until you come to a stop. |
C | Stay calm and wait for the air brakes to come on automatically. |
D | Safely bring the automobile to a stop while you still have control over the brakes. |
Question 2 |
A | 150 |
B | 125 |
C | 200 |
D | 175 |
Question 3 |
A | False |
B | True |
Question 4 |
A | Every 1,000 miles. |
B | Once a day. |
C | Before every trip. |
D | Once a week. |
Question 5 |
A | all of these. |
B | located on either end of the vehicle's axles. |
C | used to hold the brake shoes and linings. |
D | bolted securely to the wheels. |
Question 6 |
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 7 |
A | completely empty air out of the tank. |
B | prevent them from freezing during cold temperatures. |
C | prevent someone from moving the vehicle. |
D | drain oil and moisture from the tank. |
Question 8 |
A | s-cam, shoes |
B | coil, boots |
C | pressure valve, boots |
D | valve spring, shoes |
Question 9 |
A | is known as an official vehicle inspection. |
B | applies and releases the vehicle's brakes using the brake pedal. |
C | is only found on automobiles with hydraulic brakes. |
D | is only on automobiles with hydraulic brakes. |
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 | The air pressure has exceeded 150 psi. |
D | All of these. |
Question 11 |
A | remove fuel from the air lines |
B | reduce the risk of ice in the air brake valves |
C | remove oil from the air lines |
D | evaporate any alcohol, which can damage the brake system |
Question 12 |
A | To let you know how much oxygen is in the air tanks. |
B | To let you know how much diesel fuel is in the vehicle. |
C | To let you know how much water is in the air tank. |
D | None of these. |
Question 13 |
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 14 |
A | one, thirty |
B | three, sixty |
C | two, sixty |
D | one, sixty |
Question 15 |
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 16 |
A | brake system |
B | storage tanks |
C | hydraulic brakes |
D | air tank drains |
Question 17 |
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 service brake system, manual brake system, and disc brake system. |
D | The parking brake system, service brake system, and emergency brake system. |
Question 18 |
A | nitrogen and oxygen |
B | oxygen and helium |
C | compressed gas |
D | compressed air |
Question 19 |
A | the spring that is attached to the brake pedal |
B | used for parking |
C | springs that press the brakes on to stop the vehicle if the air brakes leak out |
D | specialized brakes only to be used during warm weather |
Question 20 |
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 21 |
A | governor. |
B | air tank drain. |
C | application pressure gauge. |
D | safety valve. |
Question 22 |
A | Only if they are drum brakes. |
B | Yes. |
C | Only if they are disc brakes. |
D | No. |
Question 23 |
A | disc |
B | s-cam drum |
C | wedge |
D | shoe |
Question 24 |
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 25 |
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. |
← | 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 | used to hold the brake shoes and linings. |
B | located on either end of the vehicle's axles. |
C | all of these. |
D | bolted securely to the wheels |
Question 2 |
A | The parking brake system, service brake system, and emergency 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 service brake system, manual brake system, and disc brake system. |
Question 3 |
A | governor. |
B | safety valve. |
C | air tank drain. |
D | application pressure gauge. |
Question 4 |
A | oxygen and helium |
B | compressed air |
C | nitrogen and oxygen |
D | compressed gas |
Question 5 |
A | completely empty air out of the tank. |
B | prevent them from freezing during cold temperatures. |
C | prevent someone from moving the vehicle. |
D | drain oil and moisture from the tank. |
Question 6 |
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 7 |
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 8 |
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. |
Question 9 |
A | Check your air pressure gauge and drive at highway speeds. |
B | Pump the brake pedal hard until you come to a stop. |
C | Stay calm and wait for the air brakes to come on automatically. |
D | Safely bring the automobile to a stop while you still have control over the brakes. |
Question 10 |
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 11 |
A | hydraulic brakes |
B | brake system |
C | storage tanks |
D | air tank drains |
Question 12 |
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 13 |
A | the spring that is attached to the brake pedal |
B | used for parking |
C | specialized brakes only to be used during warm weather |
D | springs that press the brakes on to stop the vehicle if the air brakes leak out |
Question 14 |
A | None of these. |
B | To let you know how much water is in the air tank. |
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 15 |
A | two, sixty |
B | three, sixty |
C | one, thirty |
D | one, sixty |
Question 16 |
A | service brake, emergency brake systems |
B | disc brake, emergency brake systems |
C | service brake, parking brake systems |
D | disc brake, parking brake systems |
Question 17 |
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 18 |
A | letting up on the brake pedal |
B | activating the emergency brake |
C | activating the parking brake |
D | pushing down on the brake pedal |
Question 19 |
A | pressure valve, boots |
B | coil, boots |
C | s-cam, shoes |
D | valve spring, shoes |
Question 20 |
A | Only if they are disc brakes. |
B | Yes. |
C | No. |
D | Only if they are drum brakes. |
Question 21 |
A | s-cam drum |
B | disc |
C | wedge |
D | shoe |
Question 22 |
A | Once a week. |
B | Every 1,000 miles. |
C | Before every trip. |
D | Once a day. |
Question 23 |
A | True |
B | False |
Question 24 |
A | 150 |
B | 200 |
C | 125 |
D | 175 |
Question 25 |
A | Dust and water. |
B | Compressed air does not contain any of these substances. |
C | Dust and compressor oil. |
D | Water and compressor oil. |
← | 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