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