Deck 5: Wheels and Tires

Question 1

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

A) Height
B) Depth
C) Width
D) Length

Answer 1

A

Question 2

________ is when the rear slip angle is larger than the front slip angle; it is referred to as the vehicle being "loose" in the corners.

A) Neutral steer
B) Understeer
C) Oversteer
D) Bad steer

Answer 2

C

Question 3

When both the front and the rear tires have equal amounts of slip angle, the vehicle is said to have ________, in which case the vehicle tends to go in the direction that the front tires are pointing.

A) Oversteer
B) Neutral steer
C) Understeer
D) None of the above

Answer 3

B

Question 4

Because the tire's construction makes it elastic, it exerts a force, called ________ force, that acts between the tread and the road surface.

A) Elastic
B) Friction
C) Cornering
D) Tread

Question 5

The tire's sideways distortion makes the vehicle follow a path at an angle to the direction the road wheel is pointing in what is called the ________.

A) Side force
B) Slip angle
C) Distortion angle
D) Right angle

Question 6

The static weight distribution is changed laterally by ________ when the vehicle is turning and in a fore-and-aft direction during acceleration or braking.

A) Cornering force
B) Centrifugal force
C) Side force
D) Slip force

Question 7

In a typical rear-wheel drive vehicle, the weight distribution is approximately _____ fore and _____ aft.

A) 75%; 25%
B) 40%; 60%
C) 60%; 40%
D) 25%; 75%

Question 8

On a typical front-wheel drive vehicle, the weight distribution is approximately _____ fore and _____aft.

A) 40%; 60%
B) 60%; 40%
C) 25%; 75%
D) 75%; 25%

Question 9

The height of the vehicle center of gravity is determined by the _______ of the center of mass above the road surface.

A) Height
B) Depth
C) Width
D) Length

Question 10

Tires and wheels work together to allow the vehicle to roll smoothly down the road. Tech A states that tires by themselves have very little rigidity. Tech B states that wheels are very rigid and have no way of absorbing the unevenness of the road surface. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 11

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

A) cords.
B) plies.
C) inner liner.
D) tread.

Question 12

Cords of synthetic strands or fabric have high ________ strength.

A) Ply
B) Synthetic
C) Value
D) Tensile

Question 13

________ construction uses body ply cords extended diagonally from bead to bead at 30- to 40-degree angles with successive plies laid at opposing angles, resulting in a crisscross pattern onto which tread is applied.

A) Bead tire
B) Radial tire
C) Bias-ply tire
D) Cupped tire

Question 14

Technician A says that the tread of a tire is made mostly of natural rubber. Technician B says that 98% of the tires now sold are of the radial design. Who is correct?

A) Technician A
B) Technician B
C) Both Technician A and Technician B
D) Neither Technician A nor Technician B

Question 15

All of the following are true, EXCEPT:

A) passenger car tires are usually filled with a special gas so they are lighter.
B) passenger car tires are designed to help absorb shock from road surfaces.
C) tread, plies, and sidewalls are parts of passenger car tires.
D) the inner liner and the bead are parts of passenger car tires.

Question 16

The _______ seat is the area of the wheel that creates a seal between the tire bead and the wheel.

A) Rim
B) Bead
C) Wheel
D) Tire

Question 17

________ tires are designed so that they can still be driven for a reasonable amount of time when the tire pressure is low or empty.

A) Self-sealing
B) No-flat
C) Run-flat
D) All-season

Question 18

________ is an abbreviation used for a double-extended hump design rim for a run flat tire .

A) H2
B) EH2
C) DEX2
D) DH2

Question 19

Run-flat tires (RFT) can also be called:

A) extended mobility technology (EMT) tires.
B) continuous mobility (CMT) tires.
C) zero-pressure (ZP) tires.
D) All of the answers listed

Question 20

________ feature a lining that serves as a puncture sealant that can permanently seal most punctures from nails, bolts, or screws up to 3/16" (5 mm) in diameter.

A) Radial tires
B) EH2 tires
C) Self-sealing tires
D) Winter tires

Question 21

Which of the following is NOT an example of a tire tread design?

A) Directional and nondirectional
B) Symmetric and asymmetric
C) Directional and asymmetric
D) Nondirectional and symmetric

Question 22

Which of the following tread patterns is designed in such a way that the tire can be mounted on the wheel for any direction of rotation?

A) Directional tread patterns
B) Nondirectional tread patterns
C) Asymmetric tread patterns
D) Directional and asymmetric tread patterns

Question 23

Tech A says that tires are marked with a date code indicating the date the tires should be discarded. Tech B says that any tires with a three-digit date code should be discarded. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 24

The aspect ratio of a tire is:

A) the width of a tire.
B) the rim diameter.
C) how much air to inflate the tire to.
D) ratio of height to width.

Question 25

The UTQG tire grading system grades tires on all of the following, EXCEPT:

A) tread wear grade.
B) traction grade.
C) temperature grade.
D) toughness grade.

Question 26

Technician A says tire with a speed rating of Z has the highest possible speed rating. Technician B says that tires with Z-speed ratings allow drivers to legally exceed posted maximum speed limits. Who is correct?

A) Technician A
B) Technician B
C) Both Technician A and Technician B
D) Neither Technician A nor Technician B

Question 27

Because tires do not come perfectly round and balanced, most tire manufacturers indicate the tire's highest point with a _______ dot and the tire's lightest point with a _______ dot.

A) Green; red
B) Yellow; green
C) Yellow; red
D) Red; yellow

Question 28

A green valve stem cap on tires on recent model-year vehicles means that the tires are:

A) filled with carbon dioxide.
B) filled with nitrogen.
C) filled with helium.
D) filled with hydrogen.

Question 29

Safety-type drop-center wheels:

A) use special metal alloys to improve safety.
B) use a chemical adhesive to ensure tires do not separate from wheels.
C) use a small ridge or hump at the inner edge of the bead ledge.
D) are obsolete and no longer used.

Question 30

Tires that are rated to TPC specs were developed for use on __________ vehicles.

A) off road
B) General Motors
C) winter climate
D) DOT

Question 31

Two technicians are discussing a tire with the size designation of P205/50R17 92H. Technician A says that this tire has a load rating of 1389 lbs. and a speed rating of up to 118 mph. Technician B says that the tire has a speed rating of up to 139 mph, and will fit a 16-inch rim. Who is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 32

Two technicians are discussing a tire with the size designation of P345/25ZR20 100Y. Technician A says that this tire has a load rating of over 1700 lbs. and a speed rating of at least 186 mph. Technician B says that the tire has a speed rating of up to 300 kph, and will fit a 20-inch rim. Who is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 33

In the United States, most states have stipulated a minimal tire tread depth of:

A) 11/32".
B) 8.73 mm.
C) 2/32".
D) None of the above.

Question 34

Which of the following do NOT compose tire tread?

A) Sipes
B) Grooves
C) Ribs
D) Nubs

Question 35

A __________ monitors the tires for low air pressure and alerts the driver if one or more tires are lower than specifications.

A) DOT
B) TPMS
C) EMT
D) CMT

Question 36

Which of the following is NOT used by tire manufacturers to identify their run-flat tires?

A) RFT
B) EMT
C) ZP
D) ZR

Question 37

These tires are for emergency use only, and must not be driven past 50 mph and no further than 50 miles.

A) Run flat tires
B) Self-sealing tires
C) Space saver tires
D) PAX tires

Question 38

Which of these tires require an inner polyurethane support ring and specialized equipment and specially trained personnel to perform service and repair?

A) Run flat tires
B) Self-sealing tires
C) Space saver tires
D) PAX tires

Question 39

Which of the following statements is NOT true regarding winter tires?

A) They can be used year-round in warm weather.
B) They are made with special rubber compounds.
C) They have deeper threads with more biting edges.
D) Winter tires may be called snow tires or studless tires.

Question 40

The diameter of wheel rims is universally measured in:

A) inches.
B) millimeters.
C) centimeters.
D) meters.