AURLTD105 WRITTEN ASSESSMENT ANAS IJAZ 20220940
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AURLTD005 Diagnose and repair light vehicle suspension systems
Assessment 1 – Questioning – Written Assessment
Student Name
Anas Ijaz
Student ID Number
20220490
Unit Start Date
09/01/2023
Unit End Date
19/02/2023
Assessment Due Date
02/02/2023
Date Submitted
30/01/2023
This cover sheet is to be completed by the student and assessor and used as a record to determine student competency in this assessment task
The assessment process and tasks were fully explained.
Yes / No
I am aware of which evidence will be collected and how.
Yes/ No
I am aware of my right to appeal an assessment decision.
Yes / No
I am aware that I can locate The RTO Complaints and Appeals Policy and Procedure on their website at
(Insert Website Link)
Yes / No
I have discussed any additional educational support or reasonable adjustments I require to undertake this
assessment with the Student Support Services Officer and Trainer / Assessor, (if applicable). e.g.,
Student Handbook and Access and Equity Policy(Insert Website Link)
Yes / No
I have access to all required resources?
Yes / No
Cheating & Plagiarism Declaration
Student Declaration: In accordance with The RTO Plagiarism Policy, I hereby acknowledge by signing this declaration that I have not cheated or plagiarized any work regarding the assessment tasks undertaken in this unit of competency except where the work has been correctly acknowledged.
NOTE: Student must sign this prior to submitting their assessments to the assessor
Signature
Anas Ijaz
Date:
30/07/2023
Assessment Results
Satisfactory
or
Not Yet Satisfactory
(Please circle the assessment result for this task)
Feedback to Student - Please provide general feedback on the student’s performance
Student Declaration: - I verify that the work completed is my own and that I was adequately informed of the assessment
Assessor Declaration: - I verify that I have adequately explained and negotiated the assessment tasks with the student
AURLTD005 Diagnose and repair light vehicle suspension systems
process prior to commencing this assessment task.
prior to commencing assessment.
Student Name: Anas Ijaz
Assessor’s Name: halim
Student Signature Anas ijaz
Date 30/01/2023
Assessor Signature
Date
Student Guide for Written Knowledge Assessment
Overview of
Assessment
This is a written assessment task you will be assess on your knowledge of diagnosing and repairing light vehicle suspension systems.
The topics that will be covered in the assessment are:
1.
Prepare to diagnose and repair light vehicle suspension systems.
2.
Diagnose suspension systems.
3.
Repair suspension systems
4.
Complete work processes
This assessment will ensure that the elements, performance criteria, performance evidence and knowledge evidence required, and conditions are adhered to demonstrate competency in this unit assessment task.
•
Read the assessment carefully before commencing.
•
Your Assessor will use the assessment criteria in this document and will provide feedback
/ comment.
•
You MUST
answer all the questions in the assessment tasks in your own words and own handwriting.
•
This is an “Open Book” assessment, and students can use the resources listed in the “Resources Required” section below.
Task/s to be assessed
To complete this written assessment, you will need to answer the 100
questions comprising of Multiple Choice, True and False, Fill-in the Gap and Short Answer questions.
Time allowed
On average, the Assessment should take 4 – 6 hours to complete.
Location
This theory assessment will be completed in a classroom under the supervision of a trainer/assessor.
Decision making rules
To receive a ‘satisfactory’ outcome for this assessment students MUST
successfully answer all questions. If a student achieves less than 100%, they can reattempt the assessment after further study has taken place. Students who cannot achieve a minimum of 100% you will not have satisfactorily completed this assessment.
Your assessor will be looking for the following in this assessment task: -
•
Work health and safety (WHS) and occupational health and safety (OHS) requirements relating to diagnosing and repairing light vehicle suspension systems, including procedures for:
o
Working with stored energy in springs and torsion bars, including when removing tension from suspension components
o
Moving heavy suspension components
•
Operating principles of light vehicle suspension systems and associated components, including:
o
Rigid and independent suspensions
AURLTD005 Diagnose and repair light vehicle suspension systems.
o
Sprung and unsprang mass
o
Ride and curb height
•
Application, purpose and operation of light vehicle suspension systems and components,
including:
o
Coil spring suspension, including:
Types of coil springs and deflection rates
Front coil spring suspension arrangements, including short arm and long
arm suspension
Rear coil spring suspension arrangements
o
Strut or MacPherson suspension
o
Leaf spring suspension
o
Torsion bar suspension
o
Multi-link suspension
o
Hydraulic suspension
o
Pneumatic suspension
o
Suspension system components, including:
Ball joint function and operation
Stabilizer bar function and operation
Watts link and Panhard rod function and operation
o
Independent rear suspension arrangements and operation
o
Shock absorber function and operation, including:
Gas-filled shock absorbers
Strut or MacPherson shock absorbers
o
Hub assemblies and bearing arrangements, including:
Hubs with tapered roller bearings
Hubs with unitized bearings
•
Diagnostic testing procedures for light vehicle suspension systems, including procedures for analyzing:
o
Component wear
o
Abnormal system noise
•
Repair procedures for light vehicle suspension systems, including procedures for:
o
Removing and replacing ball joints, suspension bushes, shock absorbers,
MacPherson struts, coil springs, leaf springs and torsion bars
o
Compressing coil springs
o
Replacing and adjusting bearings for hubs with:
Tapered roller bearings
Unitised bearings
•
Post-repair testing procedures for light vehicle suspension systems.
Assessment conditions
Assessors MUST
satisfy NVR/AQTF assessor requirements.
Competency is to be assessed in the workplace or a simulated environment that accurately reflects performance in a real workplace setting.
Assessment MUST
include direct observation of tasks.
Where assessment of competency includes third-party evidence, individuals MUST
provide evidence that links them to the light vehicle suspension systems that they have worked on,
e.g. repair orders.
Assessors MUST
verify performance evidence through questioning on skills and knowledge to ensure correct interpretation and application.
The following resources MUST
be made available:
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AURLTD005 Diagnose and repair light vehicle suspension systems
•
Automotive repair workplace or simulated workplace
•
Workplace instructions
•
Manufacturer suspension system specifications
•
Light vehicles with faults in the suspension systems specified in the performance evidence
•
Diagnostic equipment for light vehicle suspension systems
•
Tools, equipment, and materials appropriate for repairing light vehicle suspension systems.
Resources required
Learning Resources available to students include:
•
Automotive Technology (A System Approach) 6
th
Edition – Chapters 7 & 46
•
Websites– https://en.wikipedia.org/wiki/Ride_height
http://www.aa1car.com/library/ride2h.htm
https://en.wikipedia.org/wiki/Panhard_rod
https://en.wikipedia.org/wiki/Watt%27s_linkage
•
Trainer Handouts
Results/Re- assessment
•
The Assessor will grade the assessment and record the result on the front page of this document (S) – Satisfactory if all observable behaviours are correct and (NS) not satisfactory if any areas are left incorrect
•
Feedback will be provided on either result
•
Where a student receives a ‘NS – Not Satisfactory’ result, the assessor will discuss the area of the non-compliant observable behaviour and an opportunity given for re-assessment. This may be through direct observation or a different method of assessment e.g. verbal/oral questioning, problem solving exercise.
•
If the outcome is again not satisfactory the student result will be deemed (NYC) not yet competent. Additional feedback will be given, and a time agreed upon for further assessment after additional training and skills practice has taken place, this information will be recorded, dated and signed in the re-assessment area on the last page of this document
•
Where all the assessment tasks have been graded (S) Satisfactory, the student will be deemed C – Competent for the practical component and the result recorded and signed in
the area indicated on the last page of this document
Reasonable Adjustment
If the participant is unable to undertake the written assessment as designed, an interview (verbal questioning) may be used as an alternate approach.
AURLTD005 Diagnose and repair light vehicle suspension systems
Assessment 1 – Questioning
Written Assessment
•
Identify five (5) important items of personal safety when diagnosing and repairing suspension
systems?
•
Safety
Glasses
•
Safety
Gloves
•
Safety
Helmet
•
Hearing
Protection
•
Safety
Boots
Fill in the Gaps
•
Complete the following statement about working safely with suspension systems using the
following words.
Words: Disconnect, Force, Injury, Knuckle, Spring
The coil spring exerts a tremendous force
on the control arm. Before you
Disconnect either control arm from the _
Knuckle for any service
operation, contain the spring with a
Spring
compressor to prevent it from flying out and causing Injury .
True or False question
•
To remove a coil spring, raise and support the vehicle by its frame.
True
or
False
True or False question
•
When lifting and moving heavy suspension components, twist at the waist to change direction.
True
or
False
True or False question
•
When lifting and moving heavy suspension components, turns your whole body using your feet.
True
or
False
Fill in the Gaps
•
Complete the following statement about rigid (live axle) and independent suspension systems using
the following words.
Words: Axles, Front, Commercial, Independent, Move, Rear, Reduces, Rigid, Road, Suspensions, Transferred, Vehicles, Wheel
There are two general designs of _
suspensions:
those with rigid axles and those without
Rigid axles. The latter are referred to as Independent, suspensions.
Passenger and light commercial _
Vehicles have independent suspension at the
_
Front and many passenger vehicles also have it at the _
Rear .
Rigid
Axles connect the wheels on each side of the vehicle so that some of the
Road movement of one wheel will be _
Transferred through the axle to the
Wheel on the other side of the vehicle. Rigid axles are used on the rear of light
_
Commercial vehicles and some passenger vehicles.
With independent front or rear suspensions, the wheels are able to _Move up and down
independently of each other, and this Reduces body movement to
improve vehicle ride.
•
What is meant by sprung mass and unsprang mass?
Unsprang
mass
incorporates
the
mass
of
parts,
for
example,
the
wheel
axles,
wheel
direction,
wheel center
points,
tires,
and
a
segment
of
the
heaviness
of
driveshafts,
springs,
safeguards, and
suspension
joins.
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•
Why should unsprung mass be as low as possible?
In
a
vehicle
with
a
suspension,
for
example,
a
car,
cruiser
or
a
tank,
sprung
mass
(or
sprung
weight)
is the
segment
of
the
vehicle's
complete
mass that
is
upheld
over
the
suspension,
remembering
for
most
applications
around
half
of the
heaviness
of
the
suspension itself.
•
Explain ride height?
Decreasing
unsprung
weight
is
the
way
to
improving
dealing
with.
The
lower
the
unsprung
weight,
the less
work
the stuns and
springs need to
do
to
keep
the
tires
in
contact
with
the
street
over
rough
surfaces.
Fill in the Gaps
•
Complete the following statement about curb riding height using the following words.
Words: Angles, Control, Curb, Excessive, Height, Jounce, Level, Location,
Manufacturer’s Measured, Normal, Riding, Spring, Suspension, Type, Vehicle
Regular inspection and proper maintenance of suspension
systems are extremely important to maintain
vehicle
safety. The curb riding height
is determined mainly by spring
condition. Other
suspension components such as control
arm bushings will affect curb riding
height if they are
worn. Since incorrect
curb
riding height affects most of the other suspension angels , this measurement is critical. Sagged springs change the n o r m a l
operating arc of the lower ball joint. This action causes lateral movement of the tire during wheel jounce
and rebound with resulting tire wear.
The curb riding height must be measured
at the vehicle manufacturers specified.
location
, which varies depending on the types
of suspension system. When?
the vehicle is on a level
floor or an alignment rack, measure the curb riding height from the floor to the manufactures
specified location on the chassis.
Multiple Choice question. Select the correct answer.
•
The coil springs of the vehicle ?
•
Support the weight of the vehicle.
•
Respond to wheel jounce.
•
Respond to wheel rebound.
•
All answers are correct.
•
There are two (2) basic designs of coil springs. What are they?
•
Linear
Rate
•
Variable
Rate
Multiple Choice question. Select the correct answer.
•
A coil spring that is cylindrical in overall shape and has closely spaced coils at one end and widely
space coils at the other end is called a spring.
•
Torsional reflex.
•
Progressive rate.
•
Truncated cone.
•
Barrel.
Multiple Choice question. Select the correct answer.
•
What occurs when the wheel hit a dip or hole and the vehicle move downwards?
•
Jounce
.
•
Rebound.
•
Compression.
•
Deflection.
•
Explain the spring characteristics of the linear and variable rate spring.
Linear rate spring:
The
most
presentation arranged
and
springs
intended
for
hustling
will
have
a
direct rate. The
reliable
idea
of
direct
rate
springs
makes
the
vehicle
stable,
advances foothold, and
makes
the
vehicle
more
unsurprising
for
the
driver.
Variable rate spring:
Progressive
springs
become
stiffer
rapidly
as
they
are
compacted.
Reformist
springs
consider
a
smooth
ride
over
little
knocks
and
have
firm qualities
when
taking
a
piece
hit, for
example,
a
pot
opening
or
a
hard
corner.
•
Explain how the linear rate spring operates?
Direct springs
have
equivalent
distance
between
each
curl all
through
the
whole length
of
the
spring.
With
direct
springs,
the
spring
rate
is
consistent
and
isn't influenced by
the
heap
following
up
on
the
spring.
On the
off
chance
that one
applies
a 100
lb
burden
to
a spring
with
a pace of 100
lbs
•
Explain the design and operation of the variable rate spring?
Variable
rate
springs
provide
a
lower
spring
rate
under
unloaded
conditions
offering
a
smoother
ride,
and
a
higher
spring
rate
under
loaded
conditions,
resulting
in
more
support and
Control.
•
Name the five [5] different types of springs below.
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•
Coil
spring
•
Air
spring
•
Torsion
bar
spring
•
Single-Leaf
(mono)-
spring
•
Multi-leaf
spring
•
Name the twelve [12] front coil spring suspension components below.
•
Strut
top
brushing
•
Spring
insulated
bushing
•
Coil
space
spring bushing
•
Bushing
•
Lower
ball
joint
•
Stabilizer
•
Strut
rod
•
Strut rod
and
brushing
•
Strut
Bushing
•
Sway
bar
•
Upper
control arm
•
Coil
spring
•
Strut
top
brushing
Lower control arms
Upper control arms
Multiple Choice question. Select the correct answer.
•
A typical Short-Long Arm (SLA) suspension system has .
•
An upper short arm and a lower long arm.
•
Two arms of equal length.
•
A lower short arm and an upper long arm.
•
None of these answers is correct.
Fill in the Gaps
•
Complete the following statement about short and long arm suspension using the following words.
Words: Arms, Control, Joint, Moves, Steering, Suspension, Vehicles, Wheel The unequal length Control arm or short-long arm (SLA)
Suspension system has been common on domestic-made
Vehicles for many years. Each Wheel is independently connected to the frame by a Joint knuckle, ball Steering assemblies, and short upper and longer lower control Arms . Because the upper arm
pivots in a shorter arc, the top of the wheel _
Moves in and out slightly but the tire’s road contact remains constant.
•
Name the two [2] rear coil spring suspension components below.
•
How are the coil springs held in place on a rear coil spring suspension system?
The
loop
unveils
seat
to
the hub
lodging and
casing
on
the
underside of
the vehicle.
Front
and toward
The
back
development
are
constrained by
following
arms
and
control
arms.
True or False question
•
A Short-Long Arm (SLA) suspension system is also called an unequal length arm suspension system.
True
or
False
True or False question
•
Strut design in the conventional MacPherson strut, the coil spring surrounds the upper part of the strut.
True
or
False
Multiple Choice question. Select the correct answer.
•
Which of the following is NOT part of an upper strut (MacPherson) mount?
•
Ball bearing.
•
Rubber core.
•
Upper spring seat.
•
Upper ball joint.
•
Name the nine [9] MacPherson Strut components below.
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•
Nut,
Strut
to
mount
•
Strut
Mount
•
Jounce
Bumpers
•
Front
Spring
upper
insulator
•
Spring
•
front
Spring
Lower
insulator
•
Front
strut
•
Steering
Knuckle
•
Lower
Control
arm
Fill in the Gaps
•
Complete the following statement about MacPherson struts using the following words.
Words: Appearance, Combination, MacPherson, Operate, Shock, Spring, Steering, Strut, Suspension,
The MacPherson Strut suspension is dramatically different in
Appearance from the traditional independent front _
Suspension ,
but similar components _
Operate in the same way to meet suspension demand.
The MacPherson strut suspension’s most distinctive feature is the
_
Combination of the main elements into a single assembly. It typically includes the _
Spring , upper suspension locator, and _
Shock absorber. It is mounted vertically between the top arm of the _
Steering knuckle and the inner fender panel.
True or False question
•
All leaf springs are mounted to the vehicle lengthwise.
True
or
False
True or False question
•
Multi-leaf springs are fixed rate springs.
True
or
False
True or False question
•
A centring pin is often used on a leaf spring to keep the axle properly located on the springs.
True
or
False
True or False question
•
A leaf spring may be made from a fibre composite material.
True
or
False
•
Name the fifteen [15] various parts of a leaf spring suspension system below.
•
Differential
axle
•
Equalizer
•
Hangers
•
Chamber
•
Suspension
balls
•
Bushes
•
Leaf
spring
•
U bolt
Fill in the Gaps
•
Complete the following statement about leaf spring suspension using the following words.
Words: Attaches, Bumps, Centre, Clips, Consist, Flexes, Leaf, Leaves, Mono leaf, Multiple, Noise, Passenger, Plastic, Problems, Ride, Springs, Stiffer, System, Vehicle’s
Although leaf Springs were the first type of suspension spring used on
automobiles, today they are generally found only on light-duty trucks, vans, and some
Passenger cars. There are three basic types of leaf springs: multiple leaf,
_Mono leaf , and fiber composite.
Multiple-Leaf Springs Multiple-leaf springs Consist of a series of flat steel leaves that are bundled together and held with _
Clips or by a bolt placed slightly ahead of the Centre of the bundle. One leaf, called the main leaf, runs the entire length of the spring. The next Leaf is a little shorter and attaches to the main leaf. The next leaf is shorter yet and Attaches to the second leaf, and so on. This _
System allows almost any number of leaves to be used to support the _
Vehicle’s weight. It also gives a progressively
_
Stiffer spring. The spring easily flexes over small distances for minor
_
Problem . The farther the spring is deflected, the stiffer it gets. The more
Flexes and the thicker and shorter the leaves, the stronger the spring. It must be
remembered that as the spring Bumps , the ends of the leaves slide
over one another. This sliding could be a source of noise and can also
•
Shock
absorber
•
Hub
•
Shock
absorbers
bush lower
•
Rubber insulator
•
Axle
•
Axle bump
•
Fixed
shackle
pin
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produce friction. These Problems are reduced by interleaves of zinc and
plastic placed between the spring’s leaves. As the _
multiple leaves slide, friction produces a harsh ride as the spring flexes. This friction also dampens the spring motion.
Multiple Choice question. Select the correct answer.
•
Torsion bar suspension is usually found on.
•
High-performance cars.
•
Luxury cars.
•
Economy cars.
•
Light
pick-up
and
SUV’s.
•
Name the four [4] components of a torsion bar suspension system below.
•
Crossmember
•
Torsion
bar
adjuster
nut
•
Torsion
Bar
•
Lower
Control Arm
Fill in the Gaps
•
Complete the following statement about torsion bar suspension using the following words.
Words: Absorb, Attached, Bars, Compressing, Heat-treated, Lowered, Resists, Springs, Twists, Wheel
Torsion Bars serve the same function as coil _
Springs . In fact,
they are often described as straightened-out coil springs. Instead of
Compressing like coil springs, a torsion bar Twists and straightens out on the recoil. That is, as the bar twists, it _
Resists up-and- down movement. One end of the bar – made of Heat-
treated alloy spring
steel – is attached to the vehicle frame. The other end is Attached to the lower control arm.
•
First
damper
spring
•
hub
•
Sway
bar
•
Second
damper
spring
•
Chamber
arm
•
Trailing
arm
•
Chamber
arm
•
Trailing
arm
When the Wheel moves up and down, the lower control arm is raised and
Lowered . This twists the torsion bar, which causes it to _
Absorb
Road
shocks.
•
Name the eight [8] components of a multi-link suspension system below.
•
What are three (3) different multi-link rear suspensions?
•
Macpherson
strut
suspension
•
Torsion
Beam
suspension
•
Dependent
suspension
True or False question
•
A multilink rear suspension uses several control arms to guide the wheel.
True
or
False
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Fluid
damper and pressure relief valve
Compact block with pressure sensor,
pulsation
•
Name six (6) components of the hydropneumatic suspension system below?
•
Return
accumulator
•
Control
arm
•
Valve
block
•
Explain the purpose hydropneumatics suspension system?
Weight
streams
from
the
water
powered
circuit
to
the
suspension
chambers,
pressurizing
the
base
piece
of
the
circles
and
suspension
chambers.
Suspension
works
by
methods
for
a
cylinder driving
LHM
into
the circle,
compacting
the
nitrogen
in
the
upper
piece
of the circle
•
What is the purpose of the “GAS” in an hydropneumatics suspension system?
The
reason
for
this
framework
is
to
give
a
touchy,
dynamic
and
high-limit
suspension
that
offers predominant
ride
quality
on
an
assortment
of
surfaces.
Multiple Choice question. Select the correct answer.
•
The most advanced computer-controlled suspension systems are true active suspensions. They use high-
pressure actuators to carry the vehicle’s weight rather than conventional springs or air
springs.
•
Hydraulic.
•
Pneumatic.
•
Electromagnetic.
•
Vacuum.
Fill in the Gaps
•
Complete the following statement about adaptive (pneumatic) suspension using the following words.
Words: Computer, Damping, Mode, Road, Sensors, Spring, Suspensions, Systems, Vehicle
Adaptive _ Suspensions use electronic shock absorbers with variable valving. In some cases, variable air _ Spring rates are used to adapt the vehicle’s ride characteristics to the prevailing _ Road conditions or driver demands. Electronic Sensors monitor factors such as vehicle height, Vehicle speed, steering angle,
braking force, door position, shock _ Damping
status, engine vacuum, throttle position, and ignition switching. A _ Computer
is used to analyse this input and switch the suspension into a pre-set operating Mode that matches existing conditions. Some Systems
are fully automatic. Others allow the driver to select the ride mode.
•
What does the compressor do in the adaptive (pneumatic) suspension system?
Air
suspension framework is what
is
utilized
to
assimilate
the
stun
or
yanks
of
the
vehicle
while
driving
on
harsh
street.
In
that
framework an
air
pack
is
utilized
expanded
with
compacted
air.
True or False question
•
The airflow to the springs is controlled by the interaction of the air compressor, system sensors, computer control module, and solenoid valves. All of the air-operated parts of the system are connected by nylon tubing.
True
or
False
•
What is the purpose of the ball joint?
Ball
joint interface
the
control
arm to
the
directing
knuckle. The
rotating
appendage
is
a
turn between
the
haggles
suspension
of
your
vehicle.
The
rotating
appendages
are
what
permits
the
shafts
to
turn
and permits.
Multiple Choice question. Select the correct answer.
•
Ball joints are mounted to the control arms by.
•
Rivets and bolts.
•
Press fit.
•
Being
threaded
into
the
control
arm.
•
All answers are correct.
Multiple Choice question. Select the correct answer.
•
The ball joint on a conventional MacPherson strut system is a type ball joint.
•
Compression.
•
Tension.
•
Follower.
•
None of these answers are correct.
True or False question
•
Ball joints are a load-carrying ball joint supports the car’s weight and is generally found on the control arm that the spring rests on.
True
or
False
•
How does a stabilizer bar work?
Stabilizer
bars
are
part
of
a
vehicle's
suspension
framework.
They
are
sometimes
additionally
called
hostile
to
influence
bars
or
anti-move
bars
True or False question
•
The stabilizer bar provides directional stability by reducing body roll.
True
or
False
Multiple Choice question. Select the correct answer.
•
The stabilizer bar link connects the stabilizer bar to the.
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•
Steering knuckle.
•
Lower
control arm.
•
Frame/unibody.
•
Torsion bar.
Multiple Choice question. Select the correct answer.
•
When both front wheels go into jounce, the stabilizer bar?
•
Transfers the jounce force from the front wheels to the rear axle.
•
Transfers the jounce force to the shock absorbers.
•
Transfers the jounce force to the frame/unibody.
•
Pivots
in
its
bushings
but
does
not
transfer
any
force.
•
What does the Panhard rod do?
Panhard
rod
help
keep
the
hub
moving
longitudinally
•
What is a Watts link?
Watt's
linkage
is
a
sort
of
mechanical
linkage
created
by
James
Watt
in
which
the
focal
moving
purpose
of
the
linkage
is obliged
to
go on
an
estimate
to
a
straight
line.
•
Name the ten [10] components of a Watts link suspension system below?
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•
Shock
absorber
•
Coil
spring
•
Rear
axle
casing
•
Stabilizer
bar
•
Watt link
•
Watt
bracket
•
Watt link
•
Lower
link
•
Stabilizer
bar
•
Upper
link
True or False question
•
Polyurethane suspension bushings improve the vehicle’s road-holding ability and handling.
True
or
False
True or False question
•
Polyurethane suspension bushings help reduce torque steer in FWD vehicles.
True
or
False
True or False question
•
Rubber bushings used in a control arm flex and twist as the control arm moves up and down.
True
or
False
•
What are the three (3) main types of independent rear suspensions system on light vehicles?
•
Dependent
•
Independent
•
Macpherson
strut
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•
On a front wheel drive vehicle, the strut independent rear suspension system, what is the function of the
lateral control arms?
The
curl
spring
is
held set up
lower spring
plate welded
to
the
strut housing and
an
upper plate
darted
to
the
body. A
rotating
conjuncture
on
the
lower
control
arm provides
a
turn
point
for
the
controlling
knuckle.
The
MacPherson
Strut
System
is
especially
worthwhile
to
front
wheel
drive
vehicle designs.
•
What are swing axles and where can they be found?
A
swing axle is
a
type
of
rear
axle design
that
has
the
center section mounted
rigidly
to
the
vehicle's
chassis and
uses
universal
joints
to
connect the drive
axles
to
the center
section.
True or False question
•
Shock absorbers are always mounted vertically, not at an angle.
True
or
False
True or False question
•
The faster a shock absorber moves, the more resistance it has to the movement.
True
or
False
Multiple Choice question. Select the correct answer.
•
Gas-filled shock absorbers perform better on rough roads because the pressurised gas?
•
Increases
the
spring
rate.
•
Increases extension resistance.
•
Helps prevent fluid aeration.
•
Absorbs heat energy.
True or False question
•
Shock absorbers, despite their name, actually dampen spring movement instead of absorbing shock.
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True
or
False
Fill in the Gaps
•
Complete the following statement about strut shock absorbers using the following words.
Words: Absorber, Assembly, Cartridge, Damping, Front, Joint, Piston, Replacing, Serviceable, Shock, Space, Spring, Steering, Struts, Suspension, Unit, Upper,
The core element of this type of _ Suspension is the strut. With its cylindrical shape and protruding Piston rod, it looks quite similar to the conventional
Shock absorber. In fact, the strut provides the _ Damping function of the shock absorber, in addition to serving to locate the _ Spring and to fix the position of the suspension. The shock-damping function is accomplished differently on various types of Struts . None of them uses a separate shock absorber as the traditional Front suspension does.
Struts fall into two broad categories: sealed and Serviceable units. A sealed strut is designed so the top closure of the strut _ Assembly is permanently sealed. There is no access to the shock Absorber cartridge
inside the strut housing and no means of _ Replacing the cartridge.
Therefore, it is necessary to replace the entire strut Unit . A serviceable strut is designed so the _ Cartridge inside the housing, which provides the shock-absorbing function, can be replaced with a new cartridge.
The use of the strut reduces suspension Space and weight requirements. By mounting the bottom of the strut assembly to the _ Steering knuckle, the upper control arm and ball Joint of the traditional suspension are eliminated. In place of the ball joint, the Upper mount, which is bolted to the fender panel, is the
load-carrying member on MacPherson suspensions.
•
Name the eleven [11] components of a front hub and bearings below.
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•
Upper
control
arm
•
Upper
arm
bushing
•
Insulator
•
Front
bearing
•
Rear
bearing
•
Rear
arm
bushing
•
Sway
bar
•
Hub
•
Lower
control
arm
•
Circuit
wiring
•
Outer
casing
Fill in the Gaps.
•
Complete the following statement about wheel bearings using the following words.
Words: Axle, Bad, Bearings, Commonly, Front, Housing, Hub, Maintenance, Non-driving, Serviced, Shaft, Smoothly, Tapered, Wheel
The purpose of all _ Bearings is to allow a shaft to rotate smoothly in a _ Housing
or to allow the housing to rotate _ Smoothly around a shaft. Wheel and Hub bearings do this for a vehicle’s wheels. Typically, on driving axles, the Wheel is mounted to the hub of an axle shaft and the Axle rotates within a housing on an axle bearing. Wheel bearings are used on
Shaft axles. The wheel’s _ Axle rotates on a shaft called the spindle. Axle bearings are typically _ Serviced with the drive axle. Front
roller wheel bearings, however, require periodic Maintenance and
are often serviced with suspension and brake work. Although there is a distinction between axle and wheel bearings, the bearings for the _ Non-driving wheels on an FWD and 4WD vehicle are _ Commonly called wheel bearings.
Regardless of what they are called, Bad bearings can cause noise, vibration, handling, and tire wear problems.
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•
Disc
brake
caliper
•
Drive
shaft
•
Front
strut
•
Knuckle
mounting bolts
and nuts
•
Knuckle
•
Steering
knuckle
•
Hub
•
Disc
rotator
•
Axle hub
•
Outer
oil seal
•
Bearing
•
Hole
snap ring
•
Hub bearing
•
Bolt
bearing
•
Lower arm
•
Fixed
shackle
pin
•
Name the sixteen [16] components of a front hub and bearings for a front wheel drive vehicle below.
True or False question
•
A weak suspension spring can affect the wheel alignment.
True
or
False
True or False question
•
A weak suspension spring can cause poor braking.
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True
or
False
Multiple Choice question. Select the correct answer.
•
A technician is checking a suspension complaint. He depresses the front bumper a few inches by hand then releases it. When the front bumper is released, it oscillates up and down about three times before coming to rest. What could be the problem?
•
Worn ball joints.
•
Worn
stabilizer
links.
•
Worn shock absorbers.
•
Worn springs.
Multiple Choice question. Select the correct answer.
•
Which of the following would NOT cause rattling noise on road irregularities?
•
Worn shock absorbers.
•
Leaking shock absorbers.
•
Broken spring insulators.
•
Worn
strut
rod
grommets.
Multiple Choice question. Select the correct answer.
•
A weak spring will NOT cause.
•
Poor braking.
•
Abnormal steering.
•
Premature
U-joint
failure.
•
Premature ball joint failure.
Multiple Choice question. Select the correct answer.
•
When checking the front ball joints on a vehicle that has the springs mounted on the lower control arms, a
jack should be placed under the to take the spring tension off the ball joint.
•
Inboard end of the lower control arm.
•
Outboard end of the lower control arm.
•
Frame/unibody.
•
Strut rod.
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Multiple Choice question. Select the correct answer.
•
Radial and axial in the ball joints is checked using a?
•
Straightedge.
•
Dial caliper.
•
Beam-type torque wrench.
•
Dial
indicator.
•
Identify six (6) problems caused by sagging coil springs.
•
Extreme
Vehicle
Bounce
•
Inordinate
Noise
•
Decrease
Overall
Suspension
Wear
•
Irregular
Tire
Wear
•
Helpless
Handling
•
Extreme
Vehicle
Sway
•
Looking at the two [2] shock absorbers below, which one [1] is the faulty shock absorber and why?
The
two
of
them are
broken as any
oil spillage
is
unsuitable.
•
What are the three (3) types of abnormal noises that may be heard from a faulty suspension?
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•
A
thumping
sound while
going over
knocks or
turning
corners
•
A
snort
or
a
squeak
On
knocks
and
turns,
snorting
or
squeaking
methods
your
front
controlling
instrument could be wearing out
•
Corroded
entryway
pivot
like
commotions
Terrible
swiveling
appendages
in
your
suspension
Fill in the Gaps
•
Complete the following statement about noises in suspensions using the following words.
Words: Coil, Control, Knocking, Insulators, Mount, Radius, Shackles, Shock, Spring, Squeaking, Stabiliser, Steering, Strut, Suspension, Sway, Upper
Rattling on road irregularities can be caused by worn _ Shock absorber bushings or grommets, worn spring Insulators , a broken coil spring or broken Spring
insulators, worn control arm bushings, worn Stabiliser
bar bushings, and worn Strut rod grommets, worn leaf spring
Shackles and bushings, and worn torsion bars, anchors, and bushings. Dry or worn Control arm bushings may cause a creaking or Squeaking
noise on irregular road surfaces. Chatter while cornering can be caused by worn Upper strut mounts. Front strut noise on sharp turns or during Suspension jounce may be caused by interference between the Coil spring and the strut tower or between the coil spring and the upper Mount . Worn upper strut mounts or bearings can also cause binding and poor Steering return. Knocking
noises can be caused by broken Sway bar links, worn and
loose ball joints, worn control arm, strut rod, or Shock arm bushings.
Severely worn struts or shocks can also cause _ Knocking sounds,
especially over very bumpy roads.
True or False question
•
Torsion bars are directional and are marked either right or left to identify on which side it is to be used.
True
or
False
True or False question
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•
The simplest way to remove a ball joint is by heating the control arm near the ball joint with an
oxyacetylene torch, then driving the ball joint out using a hammer and brass drift.
True
or
False
True or False question
•
A technician replaces front coil springs in pairs.
True
or
False
True or False question
•
A technician marks the coil springs for position and orientation when removing coil springs that will be reused.
True
or
False
Multiple Choice question. Select the correct answer.
•
After installing a new control arm bushing, the control arm end cap nuts or bolts should not be torqued
until the vehicle?
•
Is at curb height.
•
Has
been
bounced
and
allowed
to
settle
out.
•
Front end has been aligned.
•
Both “is at curb height” and “has been bounced and allowed to settle out”.
Fill in the Gaps
•
Complete the following statement about replacing a coil spring using the following words.
Words: Arm, Ball, Bungee, Compressors, Control, Forcing, Joints, Lowered, Plates, Positioned, Remove, Spring, Stabiliser, Support, Washer
To remove a coil spring, raise and Support the vehicle by its frame. Let the control Arm hang free. Remove wheels, shock absorbers, and Stabiliser links. Disconnect the outer tie-rod ends from their respective arms.
Disconnect the brake caliper and support it with a wire or Bungee
cord so it does not hang on the brake hose. Unload the ball _ Joints
with a roll-around floor jack. Jack under the lower _ Control arm
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from the opposite side of the vehicle. This allows the jack to roll back when the control arm is
Lowered . Position the jack as close to the lower Ball joint as possible for maximum leverage against the spring. The Spring is ready for the installation of the spring compressor. There are many different types of spring _ Compressors . One type uses a threaded compression rod that fits through two _ Plates , an upper and lower ball nut, a thrust washer, and a forcing nut. The two plates are Positioned at either end of the spring. The compression rod fits through the plates with a ball nut at either end. The upper ball nut is pinned
to the rod. The thrust Washer and forcing nut are threaded onto the end
of the rod. Turning the Forcing nut draws the two plates together and compresses the spring.
Multiple Choice question. Select the correct answer.
•
From the image below, what is the technician fitting with the pressing tool into the control arm?
Tie-rod
end.
Ball joint.
U-joint.
Stabiliser
link
bush.
•
If the ball joint is riveted, how are the rivets removed to replace the ball joint and how is the new ball
joint fitted?
You
will
need
to
find
the
tops
of
the
bolts.
With
the
heads
found
you
will
need
to
take
a
middle
punch
and
make a
scratch
in
the
focal
point
of
each
top
of
the
bolt.
This
is
essential
to
ensure
you
are
focused.
In
the
event
that
you
don't
have
a
punch
this
ATD720
20pc
Punch
and
Chisel
Set
will work.
•
Explain how control arm bushes removed and replaced?
Delivery
the
Ball Joint
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Eliminate
the
Sway
Bar
Link
Eliminate
the
Control
Mounting
Bolts
Eliminate
the
Lower
Control
Arm
•
From the two (2) images below, what is the technician doing?
Install the
swagger get
together into
the
best
possible
kind
of
spring blower
Eliminate
the
old
swagger
get
together
from
the
spring
and
introduce
the
new
swagger.
Pack
the
spring
to
take
into consideration
reassembly
and
fix
the
holding jolts.
Fill in the Gaps
•
Complete the following statement about replacing a leaf spring using the following words.
Words: Absorber, housing, Insulator, Jack, Remove, Shackle, Springs, Stands, U-bolts, Vehicle, Wheel
•
Raise the Vehicle with a jack under the centre of the rear-axle housing, and place
_ Jack under the subframe to support the rear of the vehicle.
•
Remove the Wheel to make the spring more accessible.
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•
Disconnect the shock Absorber at its lower mounting, or at both mountings if it is
to be removed.
•
Lower the jack so that the _ Springs hang.
•
Remove the nuts from the _ U-
bolts and remove the spring plate and Insulator from under the spring
•
Remove the U-bolts and raise the Jack until it lifts the rear axle from the spring.
The jack now supports the rear-axle spring .
•
Disconnect the rear wheels and lower the end of the spring to the floor.
•
Remove the bolt from the spring hanger at the front of the spring and _
remove the
spring.
•
From the images below, explain the four step (4) process to remove the tapered roller bearings from the rear drum assembly.
•
Eliminating
cap
From
wheel
bearing
•
taking
the
wheel substantiating.
•
Eliminating
the
oil
seal
to
take
out
the
cap
•
taking
the Cap
out
utilizing an
apparatus
Fill in the Gaps
•
Complete the following statement about fitting tapered roller bearings using the following words.
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Words: Adjusted, Bearings, End-float, Grease, Rollers, Seal
•
Pack the Rollers with specified grease, ensuring that all the space between the
Bearings and the cage is completely filled.
•
Coat the spindle and the inside of the hub with Grease . Grease should also be
applied to the seal surface and to the inside of the Rollers .
•
After the hub and bearings are installed, the bearings should be _ Adjusted .
Generally, they are given minimum End-float or a light preloading.
•
How is the unitised bearing retained in the steering knuckle?
Press-in
course
give
a
preset gathering
that
comes
lubed and
fixed.
The
inside
clearances
are
set so
you
don't
have
to
change
the
bearing.
Subsequent
to
eliminating
the
controlling
knuckle
from
the
vehicle, eliminate.
•
Consider the various post service checks that you would make during a road test on the
suspension system?
Focus
if
your ride
starts
to
feel more
unpleasant
Observe
if
your
vehicle
pulls
or squeaks
during turns
Investigate
the
track
wear on
your
tires
Take
a
stab
at
slowing
down suddenly
to
check
whether
the
plunges
as
you stop
Multiple Choice question. Select the correct answer.
•
Which source of information will give you the most detail about diagnose and repair suspension systems
on the vehicle you are working on?
•
Workshop manual.
•
Owner’s
manual.
•
Google.
•
Textbooks.
•
Why is it very important that the Job Card is completed correctly?
The
Job
Card
gets
to
be
a
legitimate
record.
Benefit
records
are
kept
by
the
workshop
to
preserve
the vehicle’s benefit history and for legitimate purposes.
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Recommended textbooks for you
- Automotive Technology: A Systems Approach (MindTa...Mechanical EngineeringISBN:9781133612315Author:Jack Erjavec, Rob ThompsonPublisher:Cengage Learning
Automotive Technology: A Systems Approach (MindTa...
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Author:Jack Erjavec, Rob Thompson
Publisher:Cengage Learning