Suspension and steering Exam Questions and
Answers 100% Correct
what is toe out
when the front edges of the tires is further apart than the back of the tires
what is positive camber
when the wheels tilt outward at the top
what is negitive camber
when the wheels tilt inward at the top
what is wheel caster
the angle from the control arms to the wheel center.tilting back is negitive
what is the difference between belted and bias
bias chris crosses the metal strands
tire complicity what is it
how lvl the belt and plys are across the surface if it cones it will pull the tire to the sides
in a tire what is the aspect ratio in a p215/65
it means the tire side wall height is 65 percent of the tire width
what is UTQG
it is the department of transportation's (DOT) uniform tire quality Grading
UTQG tread wear rating
,base is 100. a rating of 150 will 1.5 times longer. only works through each brand so a 150 from
one company wont be the same as a 150 from another company
UTQG traction rating measures what
how fast it stops on wet asphalt or concrete. not on dry or turning. aa a b c aa is best
replace tires when the tread hieght reaches
2/32in
what is static ballance
all parts of the wheel have the same weight. so when the car is lifted no heavy spots roll to the
bottem. causes hopping
what is dynamic weight?
the side to side weight of the tires being equal. unballance causes shimmy
road force variation is?
checking for hard spots in the tire can cause bouncing
vibrations have three eliments
source or cause
path what it travels through
responder where the vibration is felt
how often and amplitude of vibrations is measured in
frequency and hertz
,shake vibration type is
a low frequency of 5-20 hertz
customer might call it a shimmy wobble
could be caused by drums, wheels, engine clutch or transmission
roughness vibration type is
higher frequency 20-50 hertz
could be a wheel bearing
kinda feels like holding a saw while cutting wood
buzz type vibration is
frequency of 50-100 hertz sounds like holding a electric razor
ussualy felt in the seat or floor
can be caused by exhaust, a/c compressor or the engine
tingling vibration type IS
very high frequency might be a complaint of putting hands to sleep
can be caused by unbalanced drive shaft
boom type vibration IS
low frequency can be caused by backfireing
moan or drone type vibration is
can sound like a bee in flight
can be caused by exhaust, engine or transition mounts
, howl type vibration is
can sound like the wind howling
usually caused by differential gears
whine type vibration is
high frequency can sound like a vacuum
caused by meshing gears
when diagnosing should check the frequency vs the rotational speed of parts
the retaining ring on a drive axle is
never reused
tpc rating
makes sure tire performs to manufacture specs
UTQG rating rates what
tracks tread wear
traction
temp ratings
thrust bearing load is also known as
axial load
garder spring
are placed behind a seal.
Answers 100% Correct
what is toe out
when the front edges of the tires is further apart than the back of the tires
what is positive camber
when the wheels tilt outward at the top
what is negitive camber
when the wheels tilt inward at the top
what is wheel caster
the angle from the control arms to the wheel center.tilting back is negitive
what is the difference between belted and bias
bias chris crosses the metal strands
tire complicity what is it
how lvl the belt and plys are across the surface if it cones it will pull the tire to the sides
in a tire what is the aspect ratio in a p215/65
it means the tire side wall height is 65 percent of the tire width
what is UTQG
it is the department of transportation's (DOT) uniform tire quality Grading
UTQG tread wear rating
,base is 100. a rating of 150 will 1.5 times longer. only works through each brand so a 150 from
one company wont be the same as a 150 from another company
UTQG traction rating measures what
how fast it stops on wet asphalt or concrete. not on dry or turning. aa a b c aa is best
replace tires when the tread hieght reaches
2/32in
what is static ballance
all parts of the wheel have the same weight. so when the car is lifted no heavy spots roll to the
bottem. causes hopping
what is dynamic weight?
the side to side weight of the tires being equal. unballance causes shimmy
road force variation is?
checking for hard spots in the tire can cause bouncing
vibrations have three eliments
source or cause
path what it travels through
responder where the vibration is felt
how often and amplitude of vibrations is measured in
frequency and hertz
,shake vibration type is
a low frequency of 5-20 hertz
customer might call it a shimmy wobble
could be caused by drums, wheels, engine clutch or transmission
roughness vibration type is
higher frequency 20-50 hertz
could be a wheel bearing
kinda feels like holding a saw while cutting wood
buzz type vibration is
frequency of 50-100 hertz sounds like holding a electric razor
ussualy felt in the seat or floor
can be caused by exhaust, a/c compressor or the engine
tingling vibration type IS
very high frequency might be a complaint of putting hands to sleep
can be caused by unbalanced drive shaft
boom type vibration IS
low frequency can be caused by backfireing
moan or drone type vibration is
can sound like a bee in flight
can be caused by exhaust, engine or transition mounts
, howl type vibration is
can sound like the wind howling
usually caused by differential gears
whine type vibration is
high frequency can sound like a vacuum
caused by meshing gears
when diagnosing should check the frequency vs the rotational speed of parts
the retaining ring on a drive axle is
never reused
tpc rating
makes sure tire performs to manufacture specs
UTQG rating rates what
tracks tread wear
traction
temp ratings
thrust bearing load is also known as
axial load
garder spring
are placed behind a seal.
