& Answers | Latest Update 2026 | 100% Pass Guarantee
1. Describe the role of wheel speed sensors in the operation of an ABS system.
Wheel speed sensors detect the angle of the steering wheel to assist
in braking performance.
Wheel speed sensors measure the pressure applied to the brake pedal
to adjust braking force.
Wheel speed sensors are used to calculate the vehicle's fuel efficiency.
Wheel speed sensors monitor the rotational speed of each wheel,
providing data to the ABS control module to prevent wheel lock-up
during braking.
2. If a mechanic notices brake pedal pulsation after performing brake service,
which procedure should they review to identify the issue?
Verify the torque on the lug nuts
Check the run-out on the car brake lathe
Inspect the brake fluid for contamination
Examine the brake pads for wear
3. If a vehicle equipped with a load sensing proportioning valve is loaded with
heavy cargo, what would you expect to happen during braking compared to
an unloaded vehicle?
The rear brakes will receive less pressure to prevent lock-up.
The overall braking distance will decrease significantly.
The front brakes will engage more aggressively.
The brake pedal will feel softer and less responsive.
,4. If a technician finds that the rear brakes are dragging after installation, what
troubleshooting steps should they take to resolve the issue?
Inspect the ABS system for faults.
Replace the brake fluid and bleed the system.
Check the adjustment of the brake shoes and ensure proper
clearance.
Replace the wheel bearings immediately.
5. What is the primary function of proportioning valves in a brake system?
They are not necessary for ABS systems
They decrease braking efficiency
They provide better braking balance during hard stops
They are only used in rear brakes
6. If a vehicle's brake line is found to be leaking, what steps should be taken to
ensure safe operation before repair?
The leak can be temporarily patched with tape until a full repair can
be made.
The vehicle can continue to be driven as long as the brake fluid is
topped off regularly.
The vehicle should be parked in a safe location and the brake
system should not be used until the leak is repaired.
The brake line should be replaced immediately without any further
inspection.
7. Where would you find the brake drum diameter specifications?
, Vehicle identification
Stamping on the drum
Vehicles owner's manual
Label on door
8. Describe the implications of introducing water into the brake fluid system.
Introducing water has no significant impact on brake fluid properties.
Introducing water enhances the fluid's ability to absorb heat.
Introducing water makes the brake fluid more effective in cold
conditions.
Introducing water can lower the boiling point of the brake fluid,
potentially causing vapor lock and brake failure.
9. Describe why air in the brake lines can lead to a spongy brake pedal.
Air in the brake lines compresses under pressure, preventing
effective brake engagement.
Air in the brake lines increases the fluid level in the brake system.
Air in the brake lines enhances the hydraulic pressure needed for
braking.
Air in the brake lines improves the responsiveness of the brake pedal.
10. One of the inside brake pads on a fixed caliper system is worn more than the
other pads. This could be caused by
binding guide pins
a restricted brake hose
a stuck caliper piston
, low brake fluid level
11. What is the primary function of a load sensing proportioning valve in a brake
system?
It enhances the grip of the brake pads.
It prevents brake fluid from leaking.
It adjusts brake pressure based on vehicle load.
It increases brake fluid temperature.
12. What action should be taken to test a vacuum power brake booster in a
vehicle?
Pump the brake pedal at least 4 times and hold it depressed before
starting the engine.
Pump the brake pedal once and immediately start the engine.
Hold the brake pedal down without pumping.
Start the engine without touching the brake pedal.
13. What is a common issue that can cause rear wheels to lock up during hard
braking in a disc/drum brake system?
Worn brake pads
Brake imbalance
Faulty ABS module
Low brake fluid
14. A vehicle has no master cylinder push rod clearance. This problem may
cause:
a spongy brake pedal