MICHIGAN STATE BRAKES
CERTIFICATION EXAM QUESTIONS
WITH VERIFIED SOLUTIONS
1. What is the primary purpose of the hydraulic brake booster?
A. To increase brake fluid boiling point
B. To multiply the force applied to the brake pedal
C. To reduce tire wear during braking
D. To cool the brake rotors faster
Answer: B
Conceptual Explanation: The hydraulic brake booster uses hydraulic pressure from the
power steering pump or an accumulator to assist and multiply the force applied by the
driver’s foot to the master cylinder.
2. Which component prevents brake lockup by modulating hydraulic pressure during hard
braking?
A. Proportioning valve
B. Anti-lock Braking System (ABS) modulator
,C. Master cylinder
D. Metering valve
Answer: B
Conceptual Explanation: The ABS hydraulic modulator controls brake fluid pressure to
individual wheels to prevent wheel lockup and maintain steering control during emergency
stops.
3. What causes brake fade when driving down a long, steep mountain grade?
A. Excessive moisture in the brake fluid
B. Thermal overloading of the friction materials and boiling fluid
C. Worn out master cylinder seals
D. Air trapped in the rear brake lines
Answer: B
Conceptual Explanation: Continuous braking generates extreme heat that can exceed the
thermal capacity of the pads and rotors, and can also cause the brake fluid to boil, resulting
in a spongy pedal and reduced stopping power.
4. When inspecting a disc brake rotor, what tool is used to measure parallel and non-parallel
thickness variation?
A. Feeler gauge
B. Dial indicator
, C. Vernier caliper
D. Outside micrometer
Answer: D
Conceptual Explanation: An outside micrometer is used to measure the thickness of a
brake rotor at multiple points around its circumference to check for thickness variation
(parallelism).
5. What is the correct method for bleeding a conventional hydraulic brake system?
A. Start at the wheel closest to the master cylinder and work away
B. Bleed all four wheels simultaneously using gravity
C. Start at the wheel farthest from the master cylinder and work closest
D. Bleed only the front wheels since they do 70 percent of the braking
Answer: C
Conceptual Explanation: The standard procedure is to start bleeding the brake line
farthest from the master cylinder (usually passenger rear) and work your way to the
closest wheel to ensure all air is purged.
6. Which type of brake fluid is glycol-based and has a higher dry boiling point than DOT 3?
A. DOT 5
B. Mineral oil
C. DOT 4
CERTIFICATION EXAM QUESTIONS
WITH VERIFIED SOLUTIONS
1. What is the primary purpose of the hydraulic brake booster?
A. To increase brake fluid boiling point
B. To multiply the force applied to the brake pedal
C. To reduce tire wear during braking
D. To cool the brake rotors faster
Answer: B
Conceptual Explanation: The hydraulic brake booster uses hydraulic pressure from the
power steering pump or an accumulator to assist and multiply the force applied by the
driver’s foot to the master cylinder.
2. Which component prevents brake lockup by modulating hydraulic pressure during hard
braking?
A. Proportioning valve
B. Anti-lock Braking System (ABS) modulator
,C. Master cylinder
D. Metering valve
Answer: B
Conceptual Explanation: The ABS hydraulic modulator controls brake fluid pressure to
individual wheels to prevent wheel lockup and maintain steering control during emergency
stops.
3. What causes brake fade when driving down a long, steep mountain grade?
A. Excessive moisture in the brake fluid
B. Thermal overloading of the friction materials and boiling fluid
C. Worn out master cylinder seals
D. Air trapped in the rear brake lines
Answer: B
Conceptual Explanation: Continuous braking generates extreme heat that can exceed the
thermal capacity of the pads and rotors, and can also cause the brake fluid to boil, resulting
in a spongy pedal and reduced stopping power.
4. When inspecting a disc brake rotor, what tool is used to measure parallel and non-parallel
thickness variation?
A. Feeler gauge
B. Dial indicator
, C. Vernier caliper
D. Outside micrometer
Answer: D
Conceptual Explanation: An outside micrometer is used to measure the thickness of a
brake rotor at multiple points around its circumference to check for thickness variation
(parallelism).
5. What is the correct method for bleeding a conventional hydraulic brake system?
A. Start at the wheel closest to the master cylinder and work away
B. Bleed all four wheels simultaneously using gravity
C. Start at the wheel farthest from the master cylinder and work closest
D. Bleed only the front wheels since they do 70 percent of the braking
Answer: C
Conceptual Explanation: The standard procedure is to start bleeding the brake line
farthest from the master cylinder (usually passenger rear) and work your way to the
closest wheel to ensure all air is purged.
6. Which type of brake fluid is glycol-based and has a higher dry boiling point than DOT 3?
A. DOT 5
B. Mineral oil
C. DOT 4
