Question 1

Technician A says if you are troubleshooting a brake pull problem and cannot pinpoint the cause, try driving the car in reverse and applying the brakes. Technician B says if the car pulls in opposite directions while braking in forward and reverse, look closely for loose or broken suspension and steering components. Who is correct?

Accepted Answer

Both technicians are correct. Technician A suggests driving the car in reverse and applying the brakes to diagnose a brake pull problem because the direction of the force on the wheels is reversed, which can help identify the cause. Technician B advises looking for loose or broken suspension and steering components if the car pulls in opposite directions while braking in forward and reverse because these components are responsible for maintaining tire alignment, and a problem with them can cause the car to pull in different directions.

Question 2

Tire load ratings are being discussed. Technician A says bias ply tires can carry more load than radial tires. Technician B says most passenger car and light truck tires were made with two, four, six, or eight plies. Who is correct?

Accepted Answer

C

Question 3

Most torque sticks (sockets)will not work correctly unless the impact wrench can produce at least ______ foot-pounds of torque.

Accepted Answer

D

Question 4

Technician A says a dial indicator should be used to check tire and wheel lateral runout. Technician B says a dial indicator should be used to check tire and wheel radial runout. Who is correct?

Accepted Answer

Both technicians are correct. A dial indicator can be used to check both radial and lateral runout in tires and wheels.

Question 5

Technician A says wheel offset is  the distance between the centerline of the rim and the mounting plane of the wheel. Technician B says the scrub radius is the distance from the tire contact patch centerline to the point where the steering axis intersects the road. Who is correct?

Accepted Answer

Both technicians are correct. Wheel offset is the distance between the centerline of the rim and the mounting plane of the wheel, and the scrub radius is the distance from the tire contact patch centerline to the point where the steering axis intersects the road.

Question 6

Technician A says a vehicle that has the tread wear indicators showing completely will likely hydroplane on wet roads. Technician B says the same condition should not affect braking on dry pavement. Who is correct?

Accepted Answer

The tread wear indicators on a tire indicate that the tire is worn to the point of needing replacement. If the tire is worn to the point where the tread wear indicators are showing completely, then the tire is considered bald and has little to no traction on wet roads, which increases the risk of hydroplaning. Additionally, the reduced tread depth will have a negative impact on braking distance on dry pavement as well. Therefore, Technician A is correct while Technician B is incorrect.

Question 7

Technician A says the wheel seal is removed with a seal puller. Technician B says the inner bearing is removed after the seal is removed. Who is correct?

Accepted Answer

Technician A is correct because the wheel seal is removed using a seal puller. Technician B is also correct because the inner bearing is typically removed after the seal has been removed. Therefore, both technician A and B are correct.

Question 8

Technician A says caster is the inward or outward tilt of the wheel measured from top to bottom and viewed from the front of the car. Technician B says camber is the backward or forward angle of the steering axis viewed from the side of the car. Who is correct?

Accepted Answer

Technician A is incorrect because caster is the forward or backward tilt of the steering axis viewed from the side of the car, not the inward or outward tilt of the wheel. Technician B is incorrect because camber is the inward or outward tilt of the wheel measured from top to bottom and viewed from the front of the car, not the backward or forward angle of the steering axis.

Question 9

Technician A says the best possible traction and braking performance can be had with the treadless, slick tires used on race cars. Technician B says all street tires have a tread pattern of ribs and grooves that lets water be displaced from under the tire while still maintaining good traction. Who is correct?

Accepted Answer

The answer of Technician A says the best possible traction...

Question 10

Tire sizes are based on all of the following EXCEPT:

Accepted Answer

Inside diameter is not a factor in determining tire size.

Question 11

Technician A says a typical service for double-row ball bearings is cleaning and packing. Technician B says tapered roller bearing services are usually part of a complete brake job. Who is correct?

Accepted Answer

The answer of Technician A says a typical service for...

Question 12

Technician A says a wheel-mounted pressure sensor uses wireless communication to send the pressure signal to a PSB computer, which in turn, illuminates the warning light or icon in the dash. Technician B says factory sensors are usually installed in place of the regular tire valve stem. Who is correct?

Accepted Answer

Both technicians are correct. Technician A accurately describes the process of how the tire pressure signal is sent from the wireless sensor to the PSB computer and how the warning light is illuminated. Technician B accurately describes how factory sensors are typically installed directly in the tire valve stem.

Question 13

Technician A says rim width is measured between the inside surfaces of the rim flanges. Technician B says every tire has two rim widths on which it can be mounted. Who is correct?

Accepted Answer

Technician A is correct. Rim width is measured between the inside surfaces of the rim flanges. Technician B is incorrect. There may be multiple rim widths on which a tire can be mounted, but it is not necessarily always two.

Question 14

In the following figure, which of the two items (A or B)indicates a worn ball joint?

Accepted Answer

The answer of In the following figure, which of the...

Question 15

Each of the following is part of the vehicle's gross vehicle weight EXCEPT:

Accepted Answer

Gross vehicle weight includes the weight of the vehicle with all fluids (including gas, oil, and coolant) and accessories necessary for operation. Therefore, option D (all fluids removed) is NOT part of the vehicle's gross vehicle weight.

Question 16

Technician A says it is acceptable to rely on visual inspection to determine if a tire is inflated properly. Technician B says that both over-inflation and under-inflation affect brake performance.

Accepted Answer

Technician A is incorrect as relying on visual inspection alone can be unreliable; a tire pressure gauge should always be used. Technician B is correct as both over-inflation and under-inflation can affect brake performance.

Question 17

What is the most likely cause of a vehicle pulling or drifting to one side when the brake is off?

Accepted Answer

The answer of What is the most likely cause of...

Question 18

Technician A says problems in the steering and suspension systems that affect braking usually are related to a pull to one side or the other. Technician B says braking problems related to steering, suspension, and wheel alignment usually involve back-end components. Who is correct?

Accepted Answer

Technician A is correct because problems in the steering and suspension can cause the vehicle to pull to one side, affecting the brakes. Technician B is incorrect because back-end components, such as the rear suspension, do not directly affect braking.

Question 19

Technician A says the information presented in the following figure is based on recommendations from the Rubber Manufacturers Association. Technician B says one of the two diagrams can be found on the vehicle's tire placard. Who is correct?

Accepted Answer

The answer of Technician A says the information presented in...

Question 20

Tire construction is being discussed. Technician A says the carcass of a tire consists of steel beads around the rim and layers of cords or plies that are bonded together to give the tire its shape and strength. Technician B says casing is the layer of rubber that contacts the road and contains a distinctive pattern to provide the desired traction. Who is correct?

Accepted Answer

Technician A is correct in describing the construction of the tire carcass, which includes steel beads and layers of cords or plies.

Technician B, however, is incorrect in describing the casing as the layer of rubber that contacts the road. The casing refers to the structure of the tire that holds the plies together and provides stability. The layer of rubber that contacts the road is called the tread, which contains the distinctive pattern to provide traction.

Quiz 3: Related Systems: Tire, Wheels, Bearings, and Suspensions