7290 -154 Revision 3

The primary purpose of the tread on a tyre is (a)   .

• Improve traction
• Enhance aesthetics
• Increase fuel efficiency
• Reduce weight

Answer explanation

The primary purpose of the tread on a tyre is to improve traction, allowing the tyre to grip the road surface better and provide better control and stability.

How is the size of a tyre typically measured?

• Diameter of the wheel

• Width of the tread

• Rim diameter

• Aspect ratio

Answer explanation

The size of a tyre is typically measured by the rim diameter, not the diameter of the wheel, width of the tread, or aspect ratio.

What does PSI stand for when referring to tyre pressure?

• Pressure on Sidewall Index

• Pounds per Square Inch

• Performance Speed Indicator

• Pneumatic System Information

Answer explanation

The correct answer is Pounds per Square Inch, as PSI stands for the unit of measurement used to indicate tyre pressure.

Which type of tyre is best suited for winter driving conditions?

• Summer tyres

• All-season tyres

• Snow tyres

• Mud tyres

Answer explanation

Snow tyres are best suited for winter driving conditions due to their specialized tread patterns and rubber compounds designed to provide better traction on snow and ice.

What does the term "wheel offset" refer to?

• Distance between the centreline and mounting surface

• Tread pattern depth

• Size of the rim

• Number of lug nuts

Answer explanation

The term 'wheel offset' refers to the distance between the centreline and mounting surface of a wheel.

What is the purpose of wheel rotation?

• Even out tyre wear

• Increase speed

• Improve fuel efficiency

• Enhance aesthetics

Answer explanation

The purpose of tyre rotation is to even out tyre wear, ensuring that all tyres wear evenly and prolonging their lifespan.

Which material is often used to make high-performance wheels?

• Steel

• Aluminium

• Carbon fibre

• Titanium

Answer explanation

Aluminium is often used to make high-performance wheels due to its lightweight and durable properties, making it ideal for enhancing performance.

What does the term "ply rating" indicate on a tyre?

• Tread pattern

• Maximum load capacity

• Tyre width

• Sidewall strength

Answer explanation

The term 'ply rating' on a tyre indicates the sidewall strength.

What does the term "rolling resistance" refer to when discussing tyres?

• Ease of changing a tyre

• Force required to keep a tyre rolling

• Traction on wet surfaces

• Colour of the tyre

Answer explanation

The term 'rolling resistance' refers to the force required to keep a tyre rolling.

What is the purpose of tyre sidewalls?

• Provide durability

• Improve aerodynamics

• Increase weight

• Enhance traction

Answer explanation

The purpose of tyre sidewalls is to provide durability, ensuring the tire can withstand various road conditions and impacts.