DFFT Tires and Wheels 2

Question 1

A vehicle exhibits excessive body lean during cornering and the tires show wear on the outer shoulders. Which fault best explains both symptoms?

Accepted Answer

Weak or worn front anti-roll bar (sway bar)

Answer

Overinflated tires

Answer

Incorrect wheel offset

Answer

Rear wheel misalignment

Question 2

When inspecting a set of tires, you notice that both rear tires show wear only on the inner edges. What alignment fault does this suggest?

Accepted Answer

Excessive negative camber at the rear

Answer

Excessive positive camber at the rear

Answer

Rear toe-in beyond specification

Answer

Rear toe-out beyond specification

Question 3

A tire pressure monitoring system (TPMS) warning light illuminates while driving. What is the correct first action?

Accepted Answer

Stop safely and check all tire pressures with a calibrated gauge

Answer

Continue driving carefully to the nearest service station

Answer

Increase tire pressure to the maximum door placard value

Answer

Reset the TPMS by disconnecting the vehicle battery

Question 4

What fault would most likely cause a rhythmic thumping noise that increases in frequency with vehicle speed and is felt through the floor at all speeds?

Accepted Answer

A flat spot on the tire from wheel lockup

Answer

A cracked wheel rim

Answer

Mismatched tire sizes front to rear

Answer

Excessive caster angle

Question 5

During a pre-drive inspection, a driver notices that one front tire appears lower than the others. Which of the following faults would cause a slow air leak from a tubeless tire?

Accepted Answer

All of the above

Answer

A nail embedded in the tread

Answer

A crack in the wheel rim bead seat

Answer

Valve stem deterioration

Question 6

A technician rotates tires front to rear and notices that the rear tires are worn significantly more than the fronts on a front-wheel-drive vehicle. What does this suggest?

Accepted Answer

The tires were not rotated at the recommended intervals

Answer

The rear brakes are dragging excessively

Answer

The rear suspension camber is misaligned

Answer

The vehicle has an active all-wheel-drive system fault

Question 7

What is the most accurate way to determine whether a tire should be replaced due to age, even if tread depth is still acceptable?

Accepted Answer

Check the tire's DOT date code for manufacture date older than 6–10 years

Answer

Measure the hardness of the tread compound with a durometer

Answer

Inspect for any visible sidewall cracking

Answer

Compare the tire's color to a new tire of the same brand