Car Tuning Aerodynamics and Body Styling 2

Question 1

What is the primary purpose of a diffuser located at the rear underside of a car?

Accepted Answer

Accelerate airflow exiting from under the car to generate downforce

Answer

A diffuser expands the underfloor airstream as it exits, lowering pressure beneath the car and creating downforce.

Question 2

Which body modification is most effective at reducing lift on the front axle at high speed?

Accepted Answer

Front splitter

Answer

A front splitter separates high-pressure air above from low-pressure air below, pushing the nose downward.

Question 3

What does a negative camber angle on the front wheels do to aerodynamic contact patches during cornering?

Accepted Answer

Keeps more tire surface in contact with the road under lateral load

Answer

Negative camber tilts the top of the wheel inward so the tire remains flatter on the road when the body rolls during cornering.

Question 4

A canard wing mounted ahead of the front wheel arch primarily does what?

Accepted Answer

Diverts airflow to cool front brakes and generates small downforce

Answer

Canards generate localized downforce and guide airflow around the front wheel arches, reducing turbulence and aiding brake cooling.

Question 5

In aerodynamic terms, what is 'flow separation' on a car body?

Accepted Answer

The point where laminar airflow detaches from the surface and becomes turbulent

Answer

Flow separation occurs when the boundary layer can no longer follow a surface, creating turbulent wake drag.

Car Tuning Practice Test