Chapter 23 Study Notes: Tire and Wheel Service

Question 1

How is tire inflation pressure affected by temperature?

Answer 1

Tires lose 1 PSI for every 10 degree drop in temperature.

Question 2

True or False? Tire inflation affects fuel economy.

Answer 2

True

Question 3

True or False? Tire inflation affects tire life.

Answer 3

True, even a slight drop in air pressure can have a major effect on the life of a tire.

Question 4

If the inflation pressure in a tire drops 10 PSI, then would the life of the tire be increased or reduced by 40%?

Answer 4

Reduced, tire inflation can have a major effect on the life of a tire.

Question 5

Match Mounting

Answer 5

Mounting a tire onto the rim with the valve stem lining up with the painted dot on the side wall of the tire. That dot marks the largest diameter (high point) and/or stiffest portion of the tire.

Question 6

Never use more than ___ PSI to seat a tire bead.

Answer 6

40 PSI

Question 7

True or False? Wheel studs should be oiled or lubricated with grease.

Answer 7

False, this can cause the wheel lug nuts to loosen while driving.

Question 8

Whenever you install a brand new set of____ wheels, re-torque the wheels after the first 25 miles.

Answer 8

Aluminum wheels.
The soft aluminum often compresses slightly, loosening the torque on the wheels.