Ohio Brake Specialist Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales
2025|2026 Q&A | Instant Download Pdf
1. Which component converts the driver’s foot pressure on the brake
pedal into hydraulic pressure?
A. Master cylinder
B. Proportioning valve
C. ABS modulator
D. Wheel cylinder
A. Master cylinder
The master cylinder generates hydraulic pressure by transferring
pedal force into pressurized brake fluid.
2. Which device prevents rear-wheel lockup during heavy braking?
A. Residual valve
B. Proportioning valve
, C. Combination switch
D. Metering valve
B. Proportioning valve
The proportioning valve reduces rear brake pressure to prevent
lockup and maintain stability.
3. What is the purpose of the metering valve in a disc/drum system?
A. Delays front disc application
B. Increases pedal effort
C. Balances brake fluid volume
D. Boosts hydraulic pressure
A. Delays front disc application
It ensures the rear drum brakes engage first so both ends apply
evenly.
4. Which test is used to check for air in brake lines?
A. Pedal reserve test
B. Pedal sponginess test
C. Booster function test
D. Metering valve test
B. Pedal sponginess test
A spongy pedal indicates compressible air in hydraulic lines.
5. Which tool measures rotor runout?
A. Vernier caliper
B. Dial indicator
, C. Micrometer
D. Torque wrench
B. Dial indicator
A dial indicator detects lateral movement (runout) of the rotor during
rotation.
6. Minimum brake pad thickness specifications are typically given by:
A. SAE standards
B. State regulations
C. Vehicle manufacturer
D. Shop policy
C. Vehicle manufacturer
OEM service manuals define safe minimum pad thickness.
7. A customer complains of a pull during braking. Which is the most likely
cause?
A. Low tire pressure
B. Worn wheel bearing
C. Unequal brake pressure side to side
D. ABS self-test noise
C. Unequal brake pressure side to side
Uneven pressure or friction creates a directional pull under braking.
8. What causes brake fade?
A. Cold brakes
B. Worn drums only
, C. Overheated friction material
D. Air in brake lines
C. Overheated friction material
Excessive heat reduces coefficient of friction, causing fading
performance.
9. Which component stores vacuum for the brake booster?
A. Vacuum switch
B. Check valve
C. Vacuum reservoir
D. Vacuum solenoid
C. Vacuum reservoir
It holds vacuum supply for consistent booster function during low
engine vacuum.
10. Which part forces brake shoes outward against the drum?
A. Return springs
B. Star wheel adjuster
C. Wheel cylinder
D. Hold-down springs
C. Wheel cylinder
Hydraulic pressure moves wheel cylinder pistons to apply brake
shoes.
11. A seized caliper piston causes:
A. Pull to the opposite side
Questions And Correct Answers
(Verified Answers) Plus Rationales
2025|2026 Q&A | Instant Download Pdf
1. Which component converts the driver’s foot pressure on the brake
pedal into hydraulic pressure?
A. Master cylinder
B. Proportioning valve
C. ABS modulator
D. Wheel cylinder
A. Master cylinder
The master cylinder generates hydraulic pressure by transferring
pedal force into pressurized brake fluid.
2. Which device prevents rear-wheel lockup during heavy braking?
A. Residual valve
B. Proportioning valve
, C. Combination switch
D. Metering valve
B. Proportioning valve
The proportioning valve reduces rear brake pressure to prevent
lockup and maintain stability.
3. What is the purpose of the metering valve in a disc/drum system?
A. Delays front disc application
B. Increases pedal effort
C. Balances brake fluid volume
D. Boosts hydraulic pressure
A. Delays front disc application
It ensures the rear drum brakes engage first so both ends apply
evenly.
4. Which test is used to check for air in brake lines?
A. Pedal reserve test
B. Pedal sponginess test
C. Booster function test
D. Metering valve test
B. Pedal sponginess test
A spongy pedal indicates compressible air in hydraulic lines.
5. Which tool measures rotor runout?
A. Vernier caliper
B. Dial indicator
, C. Micrometer
D. Torque wrench
B. Dial indicator
A dial indicator detects lateral movement (runout) of the rotor during
rotation.
6. Minimum brake pad thickness specifications are typically given by:
A. SAE standards
B. State regulations
C. Vehicle manufacturer
D. Shop policy
C. Vehicle manufacturer
OEM service manuals define safe minimum pad thickness.
7. A customer complains of a pull during braking. Which is the most likely
cause?
A. Low tire pressure
B. Worn wheel bearing
C. Unequal brake pressure side to side
D. ABS self-test noise
C. Unequal brake pressure side to side
Uneven pressure or friction creates a directional pull under braking.
8. What causes brake fade?
A. Cold brakes
B. Worn drums only
, C. Overheated friction material
D. Air in brake lines
C. Overheated friction material
Excessive heat reduces coefficient of friction, causing fading
performance.
9. Which component stores vacuum for the brake booster?
A. Vacuum switch
B. Check valve
C. Vacuum reservoir
D. Vacuum solenoid
C. Vacuum reservoir
It holds vacuum supply for consistent booster function during low
engine vacuum.
10. Which part forces brake shoes outward against the drum?
A. Return springs
B. Star wheel adjuster
C. Wheel cylinder
D. Hold-down springs
C. Wheel cylinder
Hydraulic pressure moves wheel cylinder pistons to apply brake
shoes.
11. A seized caliper piston causes:
A. Pull to the opposite side
