Exam Questions And Correct Answers

Ohio Tire And Wheel Technician Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2025|2026 Q&A | Instant Download Pdf

• What is the primary purpose of tire tread?
• Reduce tire weight
• Provide traction and channel water away
• Increase tire pressure
• Reduce fuel consumption

Rationale: Tread patterns are designed to maintain grip and evacuate

water, preventing hydroplaning.

• Which tire marking indicates the tire’s load-carrying capacity?
• DOT number
• Load index
• Speed rating 1 / 4

• Aspect ratio

Rationale: The load index represents how much weight a tire can safely

carry at maximum pressure.

• What does the "P" in P215/65R15 stand for?
• Passenger vehicle
• Performance tire
• Pressure rated
• Premium

Rationale: The “P” designates that the tire is for passenger cars.

• Which component seals air between the tire and the wheel?
• Lug nut
• Valve stem
• Bead
• Sidewall

Rationale: The bead presses tightly against the rim to create an airtight

seal.

5. A tire with excessive wear on both outer edges likely indicates:

• Underinflation
• Overinflation 2 / 4

• Misalignment
• Excessive speed

Rationale: Underinflation causes both shoulders to contact the road more

than the center.

6. The “R” in 225/60R16 means:

• Reinforced
• Radial construction
• Run-flat
• Racing

Rationale: “R” indicates the tire has radial plies running perpendicular to

travel direction.

• What is the function of wheel balancing?
• Adjust air pressure
• Prevent vibration by equalizing weight
• Increase fuel efficiency
• Reduce tread wear

Rationale: Balancing eliminates uneven weight distribution that causes

vibration.

• / 4

• What tool measures tire tread depth?
• Caliper
• Feeler gauge
• Tread depth gauge
• Torque wrench

Rationale: A tread depth gauge directly measures remaining tread in

32nds of an inch.

9. The minimum tread depth for passenger car tires in Ohio is:

• 1/16 inch
• 2/32 inch
• 3/32 inch
• 1/8 inch

Rationale: State law typically mandates 2/32 inch minimum tread depth

for safe operation.

• What causes cupping wear on tires?
• Overinflation
• Proper alignment
• Worn suspension or shocks
• Excessive braking

Rationale: Cupping results from bouncing due to worn or damaged

suspension components.

• / 4