Servicing Wheels And Tires - Quiz

1. True or False. Tires and wheels must be balanced statically and dynamically.

True

False

There are two forms of tire imbalance. Static is on one plane; dynamic imbalance is on 2.

Explanation

There are two forms of tire imbalance. Static is on one plane; dynamic imbalance is on 2.

2. True or False. A valve stem is a specially designed opening that allows a tire to be inflated and then automatically closes to prevent air from escaping.

True

False

The valve stem, which is also a Schrader Valve, is a one way valve that allows the air pressure to be trapped inside the tire.

Explanation

The valve stem, which is also a Schrader Valve, is a one way valve that allows the air pressure to be trapped inside the tire.

3. The part of the tire that makes contact with the road is the:

Cords.

Plies.

Inner liner.

Tread.

The tread of a tire is what contacts the road.

Explanation

The tread of a tire is what contacts the road.

4. The tire must be an exact fit on the rim to:

Ensure the tire and rim will seal the air in a tubeless tire.

Transfer forces between the tire and wheel without slipping or chafing.

Prevent the tire from turning on the rim.

All the above

It is important to use the proper tire size for the application doe to all of the listed.

Explanation

It is important to use the proper tire size for the application doe to all of the listed.

5. True or False. A tire with an A temperature rating has the best temperature resistance.

True

False

"A" is the highest temperature rating for a tire.

Explanation

"A" is the highest temperature rating for a tire.

6. Tires can be balanced by the __________ method.

Static

Dynamic

Road force

All the above

All of the above are methods in how we balance wheels.

Explanation

All of the above are methods in how we balance wheels.

7. The principle that allows your car to stop is:

Rubber in the tires

Friction.

Centrifugal force.

Ply rating.

Friction is what stops a car, whether it be from between the brake components or the contact of the tire with the road.

Explanation

Friction is what stops a car, whether it be from between the brake components or the contact of the tire with the road.

8. Technician A says that all lug nuts must be torqued. Technician B says that all lug nuts must be properly sequenced. Who is correct?

Tech A

Tech B

Both Techs A and B

Neither Tech A nor B

All wheel lugs need to be tightened to specification and done so in a proper sequence.

Explanation

All wheel lugs need to be tightened to specification and done so in a proper sequence.

9. True or False. The DOT number on a tire tells the technician the exact date the tire was made, to the minute.

True

False

The DOT date indicates the week of year, and the year a tire was manufactured.

Explanation

The DOT date indicates the week of year, and the year a tire was manufactured.

10. Technician A says that paying attention to tires and wheels can assist in identifying problems in the steering system. Technician B says that paying attention to tires and wheels can assist in identifying problems in the suspension system. Who is correct?

Tech A

Tech B

Both Techs A and B

Neither Tech A nor B

Steering angles that are out of specification will result in abnormal tire wear. Worn suspension parts will also result in abnormal tire wear, but in a different way than out of spec steering angles.

Explanation

Steering angles that are out of specification will result in abnormal tire wear. Worn suspension parts will also result in abnormal tire wear, but in a different way than out of spec steering angles.

11. The aspect ratio of a tire is:

The width of a tire.

The rim diameter.

How much air to inflate the tire to.

Ratio of height to width.

Aspect ratio is the ratio of height of the tire, to its width. It's the second value in a tire's size.

Explanation

Aspect ratio is the ratio of height of the tire, to its width. It's the second value in a tire's size.

12. When inspecting tires on the car, you would check for all of the following EXCEPT:

Wear.

Inflation pressure.

Punctures.

Inner lining damage.

Inning linings wouldn't be inspected unless the tire were removed from the car and dismounted from the rim.

Explanation

Inning linings wouldn't be inspected unless the tire were removed from the car and dismounted from the rim.

13. The _________ seat is the edge of the rim that creates a seal between the tire bead and the wheel.

Rim

Bead

Wheel

Disc

The bead of a tire is the belt reinforced, inner edge that seals the rubber of the tire to the metal of the rim.

Explanation

The bead of a tire is the belt reinforced, inner edge that seals the rubber of the tire to the metal of the rim.

14. A green valve stem cap on newer tires means that the tires are:

Green design.

Filled with nitrogen.

Filled with helium.

Filled with hydrogen.

The green cap represents a tire that has been filled with nearly complete nitrogen.

Explanation

The green cap represents a tire that has been filled with nearly complete nitrogen.

15. True or False. When a radial tire bulges on the sidewall, this means that the tire is underinflated all the time.

True

False

A bulge on the side of a tire indicates a broken belt on the inside of the tire.

Explanation

A bulge on the side of a tire indicates a broken belt on the inside of the tire.

16. Technician A says that 98% of the tires sold are of the radial design. Technician B says that 98% of the tires sold are of the bias ply design. Who is correct?

Tech A

Tech B

Both Techs A and B

Neither Tech A nor B

The vast majority of tires used on vehicles today are of the radial design.

Explanation

The vast majority of tires used on vehicles today are of the radial design.

17. Technician A says some tire pressure monitoring systems have a sensor mounted in each wheel rim. Technician B says some tire pressure monitoring systems use the wheel speed sensors in the ABS system to detect tire pressure. Who is correct?

Tech A

Tech B

Both Techs A and B

Neither Tech A nor B

Some TPMS compare the rotational speed of the tires to compare the size of each. Other TPMS use a sensor in each tire to monitor the pressure or each tire against programmed specifications for tire pressure.

Explanation

Some TPMS compare the rotational speed of the tires to compare the size of each. Other TPMS use a sensor in each tire to monitor the pressure or each tire against programmed specifications for tire pressure.

18. The height of the center of gravity is determined by the ___________ of the center of the mass above the road surface.

Height

Depth

Width

Length

Center of gravity is a measurement calculated with respect to where the mass is relative to its height and the horizontal placement of that object's mass.

Explanation

Center of gravity is a measurement calculated with respect to where the mass is relative to its height and the horizontal placement of that object's mass.

19. True or False. When checking air pressure, always refer to the tire sidewall, because this is the most accurate air pressure reading.

True

False

The tire sidewall provides the maximum pressure for the tire. Vehicles each have their own specific tire pressure.

Explanation

The tire sidewall provides the maximum pressure for the tire. Vehicles each have their own specific tire pressure.

20. During cornering, centrifugal force acts on a vehicle to produce:

Under-steer.

Side force.

Over-steer.

Slip angle.

The force that moves you to the side of a vehicle while turning is called side force.

Explanation

The force that moves you to the side of a vehicle while turning is called side force.

21. True or False. Over inflation of a tire causes excessive wear on the outer edges of the tread.

True

False

Over inflation causes the tire to peak. The result is a tire that rides mostly on the center part of the tread, and wearing that part more quickly.

Explanation

Over inflation causes the tire to peak. The result is a tire that rides mostly on the center part of the tread, and wearing that part more quickly.

22. There are three different wheel offsets: zero offset, positive offset, and negative offset. Technician A says that negative offset places the hub mounting closer to the brake side of the wheel. Technician B says that negative offset is farther away from the brake side of the wheel. Who is correct?

Tech A

Tech B

Both Techs A and B

Neither Tech A nor B

Negative offset is when the mounting point of the rim is closer to the hub of the vehicle.

Explanation

Negative offset is when the mounting point of the rim is closer to the hub of the vehicle.

23. Technician A says that tire pressures need to be checked when cold. Technician B says that tire pressures need to be checked before they are driven less than 1 mile. Who is correct?

Tech A

Tech B

Both Techs A and B

Neither Tech A nor B

Tire pressures are adjusted when they are cold. Cars that have been driven at least a mile are considered to have hot tires.

Explanation

Tire pressures are adjusted when they are cold. Cars that have been driven at least a mile are considered to have hot tires.

24. Technician A says that a tire will increase or decrease 1 psi for each 10°F of temperature. Technician B says that if the vehicle has been driven to warm the tires, you must adjust the air pressure down to the manufacturer's recommended pressure. Who is correct?

Tech A

Tech B

Both Techs A and B

Neither Tech A nor B

A tire's pressure will be effected 1psi by a change in 10 degrees F. Tire pressure specifications are given when the tire is cold and should only be adjusted when they are such.

Explanation

A tire's pressure will be effected 1psi by a change in 10 degrees F. Tire pressure specifications are given when the tire is cold and should only be adjusted when they are such.

25. Technician A says run-flat tires may be driven continually at zero inflation pressure. Technician B says some run-flat tires have sidewall reinforcements. Who is correct?

Tech A

Tech B

Both Techs A and B

Neither Tech A nor B

Run flat tires are used as a bailout of situations where a vehicle doesn't have room for a spare. They are like any other tire, and need to be inflated to specification. Some of these tires have side wall reinforcement to retain its structure even when there is nearly zero pressure.

Explanation

Run flat tires are used as a bailout of situations where a vehicle doesn't have room for a spare. They are like any other tire, and need to be inflated to specification. Some of these tires have side wall reinforcement to retain its structure even when there is nearly zero pressure.