Maryland Air Brakes Practice Test
This is our Maryland 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 pressure increases from 50 to 75 psi within three minutes. |
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 85 to 100 psi within 45 seconds. |
Question 2 |
A | No. |
B | Only if they are drum brakes. |
C | Yes. |
D | Only if they are disc brakes. |
Question 3 |
A | bolted securely to the wheels. |
B | located on either end of the vehicle's axles. |
C | all of these. |
D | used to hold the brake shoes and linings. |
Question 4 |
A | Before every trip. |
B | Every 1,000 miles. |
C | Once a week. |
D | Once a day. |
Question 5 |
A | remove fuel from the air lines |
B | remove oil 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 6 |
A | safety valve. |
B | application pressure gauge. |
C | air tank drain. |
D | governor. |
Question 7 |
A | Your brakes will instantly lock up. |
B | Nothing will happen. |
C | You will instantly lose braking power. |
D | You will still have some air pressure left in the air tanks. |
Question 8 |
A | used for parking |
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 | the spring that is attached to the brake pedal |
Question 9 |
A | drain oil and moisture from the tank. |
B | prevent someone from moving the vehicle. |
C | prevent them from freezing during cold temperatures. |
D | completely empty air out of the tank. |
Question 10 |
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 11 |
A | The air pressure has exceeded 150 psi. |
B | All of these. |
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 12 |
A | False |
B | True |
Question 13 |
A | disc brake, emergency brake systems |
B | service brake, emergency brake systems |
C | disc brake, parking brake systems |
D | service brake, parking brake systems |
Question 14 |
A | 150 |
B | 175 |
C | 200 |
D | 125 |
Question 15 |
A | Dust and compressor oil. |
B | Compressed air does not contain any of these substances. |
C | Dust and water. |
D | Water and compressor oil. |
Question 16 |
A | s-cam, shoes |
B | pressure valve, boots |
C | valve spring, shoes |
D | coil, boots |
Question 17 |
A | disc |
B | s-cam drum |
C | shoe |
D | wedge |
Question 18 |
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 19 |
A | brake system |
B | hydraulic brakes |
C | air tank drains |
D | storage tanks |
Question 20 |
A | is only found 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 on automobiles with hydraulic brakes. |
Question 21 |
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 22 |
A | nitrogen and oxygen |
B | oxygen and helium |
C | compressed air |
D | compressed gas |
Question 23 |
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 24 |
A | Check your air pressure gauge and drive at highway speeds. |
B | Pump the brake pedal hard until you come to a stop. |
C | Safely bring the automobile to a stop while you still have control over the brakes. |
D | Stay calm and wait for the air brakes to come on automatically. |
Question 25 |
A | two, sixty |
B | one, sixty |
C | one, thirty |
D | three, sixty |
← | 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 | 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 2 |
A | service brake, parking brake systems |
B | service brake, emergency brake systems |
C | disc brake, parking brake systems |
D | disc brake, emergency brake systems |
Question 3 |
A | Nothing will happen. |
B | You will instantly lose braking power. |
C | Your brakes will instantly lock up. |
D | You will still have some air pressure left in the air tanks. |
Question 4 |
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 5 |
A | compressed gas |
B | oxygen and helium |
C | compressed air |
D | nitrogen and oxygen |
Question 6 |
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 7 |
A | Dust and water. |
B | Dust and compressor oil. |
C | Compressed air does not contain any of these substances. |
D | Water and compressor oil. |
Question 8 |
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 9 |
A | brake system |
B | storage tanks |
C | air tank drains |
D | hydraulic brakes |
Question 10 |
A | When the compressor shuts off between 70 to 90 psi. |
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 pressure increases from 85 to 100 psi within 45 seconds. |
Question 11 |
A | When the air pressure is low. |
B | When the combined weight of your truckload and vehicle exceeds five tons. |
C | When the brakes are hot. |
D | When the temperature is below freezing. |
Question 12 |
A | valve spring, shoes |
B | coil, boots |
C | s-cam, shoes |
D | pressure valve, boots |
Question 13 |
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 14 |
A | wedge |
B | disc |
C | s-cam drum |
D | shoe |
Question 15 |
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 | Stay calm and wait for the air brakes to come on automatically. |
D | Pump the brake pedal hard until you come to a stop. |
Question 16 |
A | True |
B | False |
Question 17 |
A | applies and releases the vehicle's brakes using the brake pedal. |
B | is known as an official vehicle inspection. |
C | is only on automobiles with hydraulic brakes. |
D | is only found on automobiles with hydraulic brakes. |
Question 18 |
A | 150 |
B | 175 |
C | 125 |
D | 200 |
Question 19 |
A | one, sixty |
B | one, thirty |
C | two, sixty |
D | three, sixty |
Question 20 |
A | Every 1,000 miles. |
B | Once a day. |
C | Before every trip. |
D | Once a week. |
Question 21 |
A | governor. |
B | safety valve. |
C | application pressure gauge. |
D | air tank drain. |
Question 22 |
A | reduce the risk of ice in the air brake valves |
B | remove oil from the air lines |
C | remove fuel from the air lines |
D | evaporate any alcohol, which can damage the brake system |
Question 23 |
A | There is way too much air in the air compressor. |
B | The air pressure has exceeded 150 psi. |
C | All of these. |
D | Something is malfunctioning, and you should have the vehicle checked by a mechanic. |
Question 24 |
A | Only if they are disc brakes. |
B | Yes. |
C | No. |
D | Only if they are drum brakes. |
Question 25 |
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. |
← | 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 Maryland CDL Practice Test