Wheels And Tires Flashcards
Rim offset is determined by observing the centre line of the tire in relation to the wheel hub (blank).
a. Length b. Bolt pattern c. Dynamic horizontal plane d. Centre line
d. Centre line
The rim width is measured from the outer most edge to the inner most edge of the rim flange.
a. True b. False
b. False
A tread wear number of 500 means that the tire should wear at (blank) rate of a tread wear number of 250>.
a. Twice the b. Half the c. The same d. Two and a half times the
b. Half the
The aspect ratio of the tire refers to the ratio between the (blank).
a. Wheel diameter and the tire width b. Tire height and wheel diameter c. Tire width and wheel diameter d. Tire side wall height and tire width
d. Tire side wall height and tire width
A tire size P205/75/Rx14 92H means:
a. Passenger use, 205 mm high, 75% wide, radial, 92 mph max 14" wheel diameter b. Passenger use, 205 mm high, 75% wide, radial, High speed rated, 14" wheel diameter c. Passenger use, 205 mm wide, 75% high radial, High speed rated, 14" wheel diameter d. Passenger use, 205 mm wide, 75% high radial, H speed rated, 14" wheel diameter
d. Passenger use, 205mm wide, 75% high radial, H speed rated, 14” wheel diameter
Uniform Tire Quality Grading System, is a tire grading system for three characteristics which are:
a. Material strength, tread patch area and stability b. Tread wear, traction and temperature resistance c. Load range, cushioning action and shock resistance d. Tread wear, ply rating and load range
b. Tread wear, traction and temperature resistance
Generally, the maximum recommended tire bead seating pressure is (blank).
a. 10 psi b. 20 psi c. 30 psi d. 40 psi
d. 40 psi
A dynamically unbalanced wheel will cause:
a. Wheel shimmy b. Wheel tramp c. Wheel wobble d. Radial waddle
a. Wheel shimmy
A statically unbalanced wheel will cause:
a. Wheel shimmy b. Wheel tramp c. Wheel wobble d. Radial waddle
b. Wheel tramp
Tires should be rotated every:
a. 8000 km b. 16 000 km c. 19 200 km d. 32 000 km
a. 8000 km
It is acceptable and legal to mix radial and bias ply tires on the same axle
a. True b. False
b. False
The best puncture repair can be made by de-mounting the tire from the rim and then repairing.
a. True b. False
a. True
If a tire shows excessive wear in the centre of the tread, the problem is likely to be:
a. Over inflation b. Under inflation c. Alignment d. Balance
a. Over inflation
Tires are legally considered bald and unsuitable for use when the tread depth is (blank) or less.
a. 1/8" b. 1/16" c. 1/32" d. 2/32"
a. 1/8”
When a non driving axle bearing is the be adjusted, the correct sequence is:
a. "Seat" the bearings, back off and then set for 0.001 - 0.005" end play. b. Torque the adjuster nut, install dust cap & cotter pin c. Adjust for zero play, then torque to 15 ft/lbs, 20.3 Nm d. Torque to 15 ft/lbs, 20.3Nm and back off to next slot in nut
a. “Seat” the bearings, back off and then set for 0.001 - 0.005” end play
The correct tool to use for adjusting front wheel drive wheel bearings is a:
a. Torque wrench b. Feeler gauge c. Pipe wrench d. Water pump pliers
b. Feeler gauge
Tapered roller bearings are able to accept thrust loads:
a. True b. False
a. True
The dual ball bearings found on front wheel drive vehicles usually will require:
a. 0.003" end play b. No pre load c. A high pre load d. Periodic re-packing
c. A high pre load
The inner cone of a wheel bearing should:
a. Creep or slowly rotate on the spindle b. Be a tight fit ono the spindle c. Be staked to prevent rotation d. Welded in place
a. Creep or slowly rotate on the spindle
During bearing or brake service, wheel bearing grease seals should be replaced.
a. True b. False
a. True
Spalling of a bearing surface is the result of:
a. Inadequate lubrication b. Corrosion c. Extended service and / or overloading d. Overheating
cc. Extended service and / or overloading
During a road test, the steering wheel shakes from side to side at higher speeds. Tech A says this could be caused by front wheels not being statically balanced. Tech B says this could be caused by front wheels not being dynamically balanced. Which tech is correct?
B. Tech B only
Over-inflation of tires tends to increase:
a. The traction of the tire. b. Tire operating temperature. c. Wear on the shoulders of the tread. d. Wear in the centre of the tread.
d. Wear in the centre of the tread
When mounting wheels on a vehicle, tighten the wheel lug nuts:
a. As much as possible. b. Only after driving a few kilometers. c. Gradually and in sequence to the specified torque. d. With an impact wrench.
c. Gradually and in sequence to the specified torque.
Tech A says cupped tires can be caused by worn or defective shock absorbers. Tech B says wheels or tires with a static imbalance can cause tire cupping. Who is correct?
a. Tech A only b. Tech B only c. Both techs d. Neither tech
c. Both techs
Dynamic imbalance causes:
a. Side to side tire movement. b. Up and down tire movement. c. Tire tread cupping. d. Vehicle wander and weave.
a. Side to side tire movement
A pull condition persists after the front tires are replaced and wheel alignment has been corrected. The next logical step is to:
a. Replace the rear tires b. Inflate all tires to 50 psi c. Balance the wheels d. Switch the front tires from right to left
d. Switch the front tires from right to left
Tech A says non-serviceable wheel bearings are used mainly with FWD vehicles. Tech B says the inside wheel bearing used with adjustable bearings is larger than the outer one because the inside bearing supports more of the vehicle mass. Who is correct?
a. Tech A only b. Tech B only c. Both Techs d. Neither tech
c. Both techs
The end play of adjustable tapered roller wheel bearings should be maintained between:
a. 0.0254 to 0.127 mm (0.001 to 0.005 in) b. 0.127 to 0.178 mm (0.005 to 0.007 in) c. 0.178 to 0.254 mm (0.007 to 0.010 in) d. 0.254 to 0.381 mm (0.010 to 0.015 in)
a. 0.0254 to 0.127 mm (0.001 to 0.005 in)
Tech A says a tire is designed to absorb road shock. Tech B says the grip created between the tire and road is called traction. Who is correct?
a. Tech A only b. Tech B only c. Both techs d. Neither tech
c. Both techs
After washing tapered roller bearings with solvent:
a. Spin them dry with compressed air. b. Compressed air should not be used. c. Wipe them dry with a shop towel. d. Blow them dry without spinning
d. Blow them dry without spinning
The end play on a front wheel drive wheel bearing is 1.2 mm (0.050 in). The correct service procedure is to:
a. Replace the bearing assembly b. Spin the wheel up to 40 mph to check for noise c. Leave the bearing; no service is required d. Tighten the axle nut until end play is reduced
a. Replace the bearing assembly
Tech A says the hub, the drum or the rotor must be constantly rotating when a bearing adjusting nut is being torqued. Tech B says after a bearing adjusting nut has been initially torqued, the nut is tightened to the next cotter pin hole. Who is correct?
a. Tech A only b. Tech B only c. Both techs d. Neither tech
a. Tech A only
Tech A says the drop centre part of a rim prevents a tire from rolling off the rim if the tire becomes deflated. Tech B claims this is the function of the safety bead. Who is correct?
a. Tech A only b. Tech B only c. Both techs d. Neither tech
b. Tech B only
Which of the following conditions could result from a tire operating at lower then recommended air pressure?
a. Reduced traction b. Increased operating temperature c. Decreased operating temperature d. Accelerated wear at the centre of the tread
b. Increased operating temperature
Front wheel bearings on a front wheel drive vehicle:
a. Have no specified adjustment procedure. b. Are adjusted by tightening the spindle nut. c. Are serviced the same are rear-wheel drive wheel bearings d. Require periodic adjustment of the spindle nut
a. Have no specified adjustment procedure
Which of the following statements are true for a tire marked P215/65/R15?
a. The width of the tire is 65% of its height. b. The tire is intended for passenger vehicles. c. The tire is 215 cm in diameter d. All of the above statements are true
b. The tire intended for passenger vehicles
Wheel runout is measured using a:
a. Ruler b. Dial indicator c. Tire gauge d. Torque wrench
b. Dial indicator
Which of the following is an allowable front-to-rear mix of different types of tires?
a. bias-belted front; bias-ply rear b. radial-ply front; bias-belted rear c. bias-belted front; radial-ply rear d. none of the above
d. none of the above
A tire is worn with a sharp feathering wear pattern toward the inside of the tire. The most likely cause is:
a. Insufficient tire pressure. b. Excessive tire pressure. c. High speed cornering. d. Incorrect toe setting.
d. Incorrect toe setting
Tapered roller type wheel bearings should be packed:
a. Only by machine. b. Until all spaces between rollers are filled. c. With only NGLI #1 grease. d. While still wet with solvent.
b. Until all spaces between rollers are filled.
Excessive tire pressure can cause:
a. Weakened side walls b. A tire blow out c. Worn tread edges d. Tire overheating
b. A tire blow out
All season, radial tires wear in a heel toe, or raised tread pattern due to:
a. Incorrect wheel balance b. Under inflation c. Infrequent tire rotation d. Incorrect toe
c. Infrequent tire rotation
Radial run out causes:
a. Pull b. Hop c. Shimmy d. Wobble
b. Hop
Possible causes of lateral run out include all of the following EXCEPT:
a. Variations in sidewall stiffness b. Bent wheel hub c. Bent wheel mounting flange d. Radial wheel imbalance
a. Variations in sidewall stiffness
Check lateral wheel run out by placing a dial indicator tip against the:
a. Tire sidewall b. Wheel flange c. Bead seat d. Tire tread
b. Wheel flange
Incorrect dynamic balance causes:
a. Pull b. Hop c. Tramp d. Wobble
d. Wobble
When balancing the wheels and tires on a vehicle with steel wheels, it is advisable to:
a. Add no more than 6 ounces (170 grams) total to each wheel b. Use adhesive backed wheel weights c. Add no more than 6 ounces (170 grams) to each side of the wheel d. Add the same amount of weight to each wheel
a. Add no more than 6 ounces (170 grams) total to each wheel
To rotate the tires on a FWD car:
a. Cross the front wheels to the rear and move the rear wheels straight forward b. Cross the rear wheels to the front and move the front wheels straight back c. Cross the front wheels to the rear and cross the rear wheels to the front d. Move the front wheels straight back and the rear wheels straight forward
b. Cross the rear wheels to the front and move the front wheels straight back
When rotating directional tires:
a. Cross the front wheels to the rear and move the rear wheels straight forward b. Cross the rear wheels to the front and move the front wheels straight back c. Cross the front wheels tot he rear and cross the rear wheels to the front d. Move the front wheels straight back and the rear wheels straight forward
d. Move the front wheels straight back and the rear wheels straight forward
To measure tire run out, you must use:
a. Micrometer b. Dial gauge on tire tread c. Spin it on a tire machine d. Bubble gauge
b. Dial gauge on tire tread
Rim offset is determined by observing the centre of the tire in relation to the wheel hub:
a. Length b. Bolt pattern c. Dynamic horizontal plain d. Center line
d. Center line
Radial tire run out is measured by:
a. Dial indicator on rim b. Dial indicator on tread c. Dial indicator on tire side wall d. Straight edge on rim
b. Dial indicator on tread
All of the following are tire wear angles EXCEPT:
a. Camber b. Caster c. Toe d. Toe out on turns
b. Caster
Incorrect tire inflation causes:
a. Hard steering b. Shimmy c. Vibration d. Torque steer
a. Hard steering
Brinelling of a bearing surface is the result of:
a. Inadequate lubrication
b. Corrosion
c. Extended service and / or overloading
d. Overheating
a. Inadequate lubrication
It is acceptable to mix wheel bearing greases.
a. True
b. False
b. False
Disc brake equipped vehicles require the same wheel bearing grease as drum brake equipped vehicles.
a. True
b. False
b. False
Excessive tire pressure can cause:
a. Weakened side walls
b. A tire blow out
c. Worn tread edge
d. Tire overheating
b. A tire blow out
All season, radial tires wear in a heel toe, or raised tread pattern due to:
a. Incorrect wheel balance
b. Under inflation
c. Infrequent tire rotation
d. Incorrect rear toe
c. Infrequent tire rotation
Radial run out causes:
a. Pull
b. Hop
c. Shimmy
d. Wobble
d. Hop
Possible causes of lateral run out include all of the following EXCEPT:
a. Variations in side wall stiffness
b. Bent wheel hub
c. Bent wheel mounting flange
d. Radial wheel imbalance
a. Variations in side wall stiffness
Check lateral wheel run out by placing a dial indicator tip against the:
a. Tire sidewall
b. Wheel flange
c. Bead seat
d. Tire tread
b. Wheel flange
