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Ch 7 Tire and Wheel Diagnosis and Service

Terms in this set (40)

________ stems are normally replaced when new tires are mounted on the rims.
Rubber press-fit
If the tire pressure is incorrect, the technician must adjust the pressure using ________.
Either A or B
When attempting a repair on a damaged tire all of the following are true; EXCEPT:
a tire plug by itself is an acceptable repair.
A relatively good way to test for an air leak in a tire and wheel assembly is to:
spray the tread area, both bead areas and the valve stem area with a bottle of soapy water.
Two technicians are discussing tire puncture repair using a tire patch. Technician A says that you should use a tire buffer to smooth the area around the hole. Technician B says that a liquid buffing solution should be used to scrub the area just buffed. Who is correct?
Both Technician A and Technician B
Technician A says that as long as a lug nut threads onto the wheel stud, it can be used on any type of wheel. Technician B says that it's critical that both wheel and hub (or flange) mounting surface be clean and free of dirt and mud. Who is correct?
Technician B
Failure to properly position the tire in the rim's drop-center section before attempting to dismount the tire can result in _________.
All of the above
A young technician often breaks off the first one or two wheel studs on the first wheel he or she is removing on a new project vehicle. Technician A says to first spray all of the lug nuts with penetrating liquid. Technician B says to be sure the impact wrench is set for the correct rotation (e.g., counter-clockwise). Who is correct?
Technician B
Technician A says a tire with a Z speed rating was the highest possible speed rating. Technician B says that tire speed ratings give the legal cover for speeding. Who is correct?
Tech A
Paying close attention to the wheels and tires can also assist in identifying problems with other vehicle systems, particularly in ________ and ________ systems.
Steering; suspension
Tires on many vehicles are inflated to about ________ pounds per square inch (psi).
32
The ______ is inspected to ensure that it is above the built-in wear indicators, which indicate that the tire is at the end of its legal life and should be replaced.
Tread depth
The tire pressure should be regularly checked and adjusted on vehicles that do not have a(n) ________.
TPMS
________ is the appearance of dips around the edge of the tread, usually on just one side of the tire.
Cupping
________ wear indicates that the vehicle has been driven with the tires consistently underinflated, or the driver regularly corners the vehicle at excessive speeds.
Edge
________ wear is when the ribs in the middle of the tire wear faster than those on each side.
Center
When inspecting tires installed on the car, you should check for all of the following, EXCEPT:
inner lining damage
Technician A claims that there are only two car/light truck tread pattern designs: street and off-road. Technician B claims the most common car/light truck tread pattern designs are directional, nondirectional, symmetric, asymmetric, and directional and asymmetric. Who is correct?
Technician B
Technician A says that observing tire wear patterns can assist in identifying problems in the steering system. Technician B says that observing tire wear patterns can also assist in identifying problems in the suspension system. Who is correct?
Both Technician A and B
The tire must be an exact fit on the wheel to:
All the answers listed
Manufactures recommend that tires are rotated at:
every oil change.
All of the following are true about "directional" tires; EXCEPT:
Directional tires should be rotated so they turn the opposite direction as before.
All of the following statements about rotating tires is true; EXCEPT:
rotating tires increases maximum vehicle speed.
Which of the following four-tire rotation patterns is not commonly specified?
Round about
Tech A says that directional tires cannot be rotated. Tech B says that all old wheel weights should be removed before balancing a tire. Who is correct?
Tech B
Tires can be balanced by the __________ method.
All the above
________ tires have very short sidewalls and can be difficult to remove and install.
Low-profile
The ________ on the tire changer can hold the rim by grasping it from the outside or the inside.
Turntable jaws
________ is when the red dot is lined up with the rim's lowest point.
Match mounting
________ is when the yellow dot is matched up with the rim's heaviest point.
Weight matching
________ occurs when a spot on either the inside or the outside of the tire's centerline is heavy.
Dynamic imbalance
When balancing wheels with either Dynamic or Road Force Balancers, Technician A says it is really important to follow the instructions provided with the particular balancer you're using. Technician B says that when rebalancing a wheel, if it is out of balance, it is best to remove the old weights and recheck the balance before adding new weights. Who is correct?
Both Technician A and Technician B
________ occurs when a part of the wheel assembly becomes bent or was manufactured improperly.
Run out
Rust can often cause the wheel to become stuck to the axle flange or hub due to the snug fit between the wheel and hub (or axle flange). When this happens, Technician A says to first notify your supervisor and seek assistance. Technician B says to first use an oxyacetylene torch to loosen the rust's grip on the parts. Who is correct?
Neither Technician A nor Technician B
When inspecting tires on the car, you would check for all of the following EXCEPT:
inner lining damage.
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
________ is most commonly a result of the tires set with excessive toe-in or toe-out.
Feathering
Technician A says the appearance of tire wear indicator bars indicate that tire pressure is low and therefore pressure should be increased. Technician B says tire indicator bars are a quick visual warning that tire tread is worn down to the unserviceable level and the tires should be replaced. Who is correct?
Technician A
Technician B
Technician A says that camber used to be a heavy tire-wearing angle when tires were the bias-ply type and had stiff sidewalls. Technician B says tires can tolerate huge amounts of improper camber much better than before. Who is correct?
Correct Answer
Technician A
________ is when the yellow dot is matched up with the rim's heaviest point.
Weight matching
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