Car Tuning Car Maintenance 4

Question 1

What is the purpose of wheel balancing when installing new tires?

Accepted Answer

To distribute weight evenly around the wheel/tire assembly and prevent vibration

Answer

Uneven weight distribution in a wheel/tire assembly causes vibration at speed; balancing weights correct this.

Question 2

Which engine oil additive property is indicated by the 'W' in a rating like 5W-30?

Accepted Answer

Winter cold-flow performance

Answer

The 'W' stands for Winter and describes how well the oil flows at low temperatures, affecting cold-start protection.

Question 3

Why is it important to torque lug nuts in a star pattern?

Accepted Answer

To ensure even clamping force and prevent brake rotor warping

Answer

Tightening opposite lugs alternately distributes clamping load evenly, preventing the wheel from seating at an angle and warping the rotor.

Question 4

What does it mean when your power steering fluid appears dark brown or black?

Accepted Answer

The fluid is heavily oxidized and contaminated and should be flushed

Answer

Dark power steering fluid indicates oxidation and rubber seal degradation, which can damage the rack and pump if not flushed.

Question 5

A car pulls to one side during braking. What is the most likely cause?

Accepted Answer

A sticking brake caliper or uneven brake pad wear

Answer

A stuck caliper applies braking force on one side only, creating an imbalance that pulls the vehicle toward the dragging brake.

Car Tuning Practice Test