Steering and Suspension 1

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?

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

Answer explanation

Paying attention to the wheels and tires can also assist in identifying problems with other vehicle systems, particularly in steering and suspension systems.

The purpose for a drop center in the wheel is to allow for:

• better heat dissipation.

• the exact size.

• tire mounting and dismounting.

• cooler looking wheels.

Answer explanation

The drop center is used for mounting and dismounting the tire onto the rim.

A customer has a P235/45ZR17 tire.  What does the P stand for?

• Parallel

• Passenger

• Protection

• Popular

A customer has a 265/75R16 sized tire.  What does 265 represent?

• Aspect ratio

• Width of the tire in centimeters

• Width of the tire in milimeters

• Speed rating

A customer has a 265/75R16 sized tire.  What does the 75 represent?

• The aspect ratio

• Height of the sidewall in millimeters

• Width of the tire in centimeters

• Mileage rating

A customer has a 265/75R16 sized tire.  What does the R represent?

• Rim size

• Radial tire

• Radius of the tire

• Directional Rotation

Tire aspect ratio is being discussed.  Technician A states a tire's sidewall height (from rim to tread) is a percentage of the section width of the tire. Technician B states the higher the number, the taller the sidewall; the lower the number, the lower the sidewall.  Who is correct?

• Technician A

• Technician B

• Both technicians

• Neither technician

A customer has a 265/75R16 sized tire.  What does the 16 represent?

• The tire or wheel diameter

• Radius of the tire

• Speed rating of the tire

• Aspect ratio

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

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

Answer explanation

Run flat tires enable a driver to continue a journey within specified speed and distance (about 50 mph and at least 50 miles.). The sidewall is constructed with reinforced rubber and is thicker than in conventional tires, enabling it to carry the vehicles weight at zero pressure.

Technician A says some tire pressure monitoring systems (TPMS) 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?

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

Answer explanation

A direct TPMS sensor directly measures the tire pressure via a sensor installed in each wheel. The most prevalent indirect tire pressure monitoring systems in use today utilize the ABS wheel speed sensors to measure the difference in the rotational speed of the four wheels. A wheel that is rotating faster than the others indicates that the tire has lower pressure than the other tires.