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DMV PRACTICE
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Air Brake Practice Test
Practice mode
Question
1
of 25
QUESTION 1 / 25
What could be a consequence of a malfunctioning safety valve in the air system?
Choose one answer below.
A
Increased stopping power
✓
B
Over-pressurization of the system
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C
Improved response time
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D
Increased air tank capacity
✓
QUESTION 2 / 25
What system will you require to stop the vehicle if a failure in the service brake system happens?
Choose one answer below.
A
Parking brake system
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B
Hand brake system
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C
Brum brake system
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D
Emergency brake system
✓
QUESTION 3 / 25
What is a common type of air brake failure?
Choose one answer below.
A
Air leak
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B
Fluid loss
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C
Brake pads wear
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D
Electrical malfunction
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QUESTION 4 / 25
Name the device that stores compressed air in an air brake system.
Choose one answer below.
A
Air reservoir tank
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B
Brake shoe
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C
Master cylinder
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D
Pressure gauge
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QUESTION 5 / 25
What should you do each day during winter weather when the car is packed with an alcohol evaporator?
Choose one answer below.
A
Change the alcohol from a new bottle
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B
Drain the accumulated alcohol
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C
Check and fill the alcohol level
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D
Remove old alcohol completely
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QUESTION 6 / 25
Which of the following is NOT a characteristic of air brakes?
Choose one answer below.
A
They require air to operate
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B
They are slower to respond than hydraulic brakes
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C
They use fluid for braking force
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D
They involve a series of pneumatic components
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QUESTION 7 / 25
What does the supply pressure gauge indicate regarding the s-cam?
Choose one answer below.
A
The pressure of the air tank
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B
How long before the s-cam changes direction
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C
Overall brake efficiency
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D
The level of contamination
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QUESTION 8 / 25
How can moisture in the air brake system affect performance?
Choose one answer below.
A
It enhances braking effectiveness
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B
It can cause brake freezing and corrosion
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C
It increases the air pressure
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D
It makes the brakes quieter
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QUESTION 9 / 25
How often should air brake reservoirs be drained?
Choose one answer below.
A
Once a week
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B
Every month
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C
At least once a day
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D
Only when damaged
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QUESTION 10 / 25
How do you perform a functional check of the air brake system?
Choose one answer below.
A
By checking for air leaks only
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B
By checking brake response and proper release while performing road tests
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C
By inspecting the air compressor
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D
By monitoring brake pad thickness
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QUESTION 11 / 25
How can drivers ensure they have sufficient air pressure before operating a vehicle?
Choose one answer below.
A
By checking the brake fluid level
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B
By monitoring the air pressure gauge
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C
By visually inspecting the brakes
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D
By listening for air leaks
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QUESTION 12 / 25
If you need to make a swift emergency stop, what is the primary action you should take?
Choose one answer below.
A
Keep on a straight line and maintain control.
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B
Locking them, using the full brake power.
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C
Steer hard while also braking hard.
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D
Apply brakes gradually to avoid skidding.
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QUESTION 13 / 25
What indicates that spring brakes have engaged?
Choose one answer below.
A
Increased air pressure
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B
Activation of warning lights
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C
Loss of air pressure
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D
Engagement of the foot brake
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QUESTION 14 / 25
What can help prevent brake vandalism and tampering?
Choose one answer below.
A
Regular inspections
✓
B
Air pressure monitoring
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C
Visual deterrents
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D
Sturdier brake components
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QUESTION 15 / 25
What is an indicator of improperly adjusted air brakes?
Choose one answer below.
A
Reduced fuel efficiency
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B
Increased stopping distance
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C
Frequent air leaks
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D
Abnormal noise during braking
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QUESTION 16 / 25
What is one important reason to check your air brake system regularly?
Choose one answer below.
A
To prevent air tank corrosion.
✓
B
To ensure proper oil levels.
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C
To avoid pressure loss.
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D
To maintain vehicle speed.
✓
QUESTION 17 / 25
Which part of the air brake system holds air pressure?
Choose one answer below.
A
Compressor
✓
B
Reservoir
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C
Brake pedal
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D
Warning light
✓
QUESTION 18 / 25
Which of the following are the two primary types of air brake systems?
Choose one answer below.
A
Single-circuit and dual-circuit systems
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B
Compressed and hydraulic systems
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C
Active and passive systems
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D
Front and rear systems
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QUESTION 19 / 25
The most popular form of foundation brake is which type?
Choose one answer below.
A
S-Can drum
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B
Disk brake
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C
Hydraulic brake
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D
Electric brake
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QUESTION 20 / 25
What is an indication that air brake reservoirs are leaking?
Choose one answer below.
A
Continuous loss of air pressure
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B
Unresponsiveness of brake pedals
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C
Discoloration of reservoir surfaces
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D
Unusual vibrations from the brake system
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QUESTION 21 / 25
When are you supposed to use a parking brake in air brake-powered vehicles?
Choose one answer below.
A
Only during pre-trip and post-trip inspections
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B
Every time you park the vehicle
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C
As little as possible
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D
When slowing down
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QUESTION 22 / 25
Which of the following systems is not typically associated with air brake mechanisms?
Choose one answer below.
A
Hydraulic assist system
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B
Pneumatic system
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C
Electrical control system
✓
D
Fail-safe system
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QUESTION 23 / 25
In a conventional air brake system, which of the following mechanisms is used to engage the brakes when a driver applies pressure?
Choose one answer below.
A
Engine brake
✓
B
Service brake
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C
Foot brake
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D
Emergency brake
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QUESTION 24 / 25
When should you release the parking brake in an air brake system?
Choose one answer below.
A
Only when you are ready to move
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B
At the start of every trip
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C
When the vehicle is on a slope
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D
When checking the air pressure
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QUESTION 25 / 25
True or False: Braking on a long steep downgrade is just an addition to the engine's braking effect.
Choose one answer below.
A
True.
✓
B
False.
✓
C
Only during emergencies.
✓
D
Only if the brakes are adjusted.
✓
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