Context and Conditions of Assessment
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.
AURTTC003 Diagnose And Repair Cooling Systems Assignment-Trinity Institute Australia.
Read the assessment carefully before commencing.
This is an open book assessment and will be conducted at the RTO address.
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 assessment will be required to be completed in 8 hours
Your Trainer / Assessor will inform you of the due date for this assessment task.
Your Assessor will grade as either S – Satisfactory or NS – Not Satisfactory for the assessment. In all cases your Assessor will provide you with feedback.
Only when all assessment tasks have been graded as S – Satisfactory you will be deemed C – Competent in the final result of the unit of competency; if you do not satisfactorily complete all the assessment tasks you will be deemed NYC – Not Yet Competent.
Re-Assessment Conditions
- If the evidence is graded as NS – Not Satisfactory you will be required to re-submit the evidence. In this case, you will be provided with clear and constructive feedback based on the assessment decision so that they can improve your skills / knowledge prior to reassessment.
- Where a ‘NS – Not Satisfactory’ judgement is made, you will be given guidance on steps to take to improve your performance and provided the opportunity to resubmit evidence to demonstrate competence. The assessor will determine and discuss the reasons for NS – Not satisfactory on any of the criteria and will assess you through a different method of assessment e.g. verbal/oral questioning, problem solving exercises.
- You will be notified within 10 working days of undertaking an assessment of their result in achieving competency
o If a student does not complete the assessment, they should notify their trainer as to why they did not complete the assessment and if due to illness, a medical certificate must be produced. “This process is detailed more in the “Training and Assessment Policy and Procedure”
o In the above scenario, student will be given an opportunity for reassessment within 5 working days with no reassessment fee charged.
o Students who are deemed to be Not Yet Competent (NYC) will be provided with information identifying the areas in which they failed to achieve competency. Students will then have the opportunity to repeat the assessment task within 5 working days of notification with no reassessment fee charged.
o If a student is deemed NYC in the reassessment or if the student did not approach the RTO within five working days with a valid reason for not availing themselves of the reassessment opportunity, then those students will be given a final chance to re-sit the assessment and will be charged at $200.00. - o After this no further reassessment attempt will be provided to the student and the student will be required to repeat the whole unit with full fee for the unit as per the fees policy of the RTO. The student will be made aware of the impact of repeating the unit may have on their student visa.
- o If a student is found to be cheating or plagiarising their assessment, a $200.00 reassessment fee will be charged for reassessing the assessment within 5 working days.
- o If the student is found to be plagiarising or cheating again after conclusion of the Intervention meeting with the Course Co-ordinator, the matter will be referred to the CEO / Operation Manager which may result in the suspension or cancellation of their enrolment
Assessment 1 – Questioning
1.Identify five (5) important items of personal safety when diagnosing and repairing cooling systems?
1
2
3
4
5
2.Describe the safety precaution that must be observed before removing the radiator cap or disconnecting any component of a hot cooling system?
3.Why should the radiator cap NEVER be removed when the engine is hot?
4.What are the potential danger of working near electric thematically operated cooling fans?
5.When handling, trapping, storing and disposing of new or waste coolants, which document should you use to find this information?
6.How should waste coolant be stored and disposed?
7.When changing the coolant in the cooling system, what should you use to catch the waste fluid?
A. Drain pan
B. Mop bucket
C. Storm water drain
D. Funnel
8.What is the difference between heat and temperature?
9.What are the four (4) possible effects when heat is applied to a substance?
1
2
3
4
10.What is the unusual effect that occurs with water when its temperature is reduced?
11.Heat can be transferred in three (3) different ways. What are these?
12.What is meant by radiation?
13.Complete the following statement about air cooled systems using the following words.
Words: Directly, Engines, Fins, Hoses, Transferred
An air-cooled ——– is simpler to design then the water-cooled engine because the heat is _
from the cylinder and head——– to the air. There is no need for water jackets, ——–, water
pump, radiator, etc. But, the engine design uses many ——- on the cylinder and head for effective heat transfer to the surrounding air.
14.How is heat removed from the engine?
15.Why is it necessary to remove heat from the engine?
16.Ethylene glycol antifreeze is ——.
A. The most commonly used antifreeze
B. Green in colour
C. Poisonous
D. All answers are correct
17.The minimum concentration of antifreeze is ——-.
A. 20% antifreeze, 80% water
B. 33% antifreeze, 66% water
C. 44% antifreeze, 56% water
D. 50% antifreeze, 50% water
18.List three (3) different types of antifreeze.
1
2
3
19.In most automotive applications, the water pump is driven by the __.
A. Flywheel
B. Camshaft
C. Crankshaft
D. Impeller
20.Water pumps are _ type pumps.
A. Positive displacement
B. Negative displacement
C. Centrifugal
D. Reciprocating
21.The heart of the cooling system is the water pump. Its job is to move the coolant through the system.True or False:
22.What is the function of the thermostat?
23.During engine warm-up, when the thermostat is closed, _.
A. Coolant flows through the radiator
B. Coolant flows through the bypass passage
C. Both “coolant flows through the radiator” and “coolant flows through the bypass passage”
D. Neither “coolant flows through the radiator” nor “coolant flows through the bypass passage”
AURTTC003 Diagnose And Repair Cooling Systems Assignment-Trinity Institute Australia.
24.Complete the following statement about bypass thermostats using the following words.
Words: Bypass, Coolant, Engine, Open, Prevents, Radiator, Secondary, Thermostats, Valve
Bypass _ increase cooling system efficiency. They do this by ensuring that all _ passes through the radiator when the _ is at correct operating temperature.
This thermostat has two valves: a primary and a _. When the engine is cold, the primary valve is closed and this _ fluid from reaching the radiator. The secondary valve is _, and this allows the coolant to bypass the _ and go back into the engine.
As the engine temperature rises, the primary _ opens and the secondary valve closes. This blocks off the __ and all the coolant is then directed through the radiator.
25.Electric cooling fans may be controlled by the engine control module (ECM)? True or False:
26.What is the function of a fan clutch?
27.Complete the following statement about cooling fans using the following words.
AURTTC003 Diagnose And Repair Cooling Systems Assignment-Trinity Institute Australia.
Words: Air, Engine, Cooling, Motor, Removed, Speeds, Steering
The efficiency of the _ system depends on the amount of heat that can be _ from the system and transferred to the air. At highway _, the ram air through the radiator should be sufficient to maintain proper cooling. At low speeds and idle, the system needs additional _. This
air is delivered by a fan. The fan may be driven by the _, via a belt, driven by an electric _, or hydraulically through the power-__ system.
28.Briefly, how does a hydraulic cooling fan operate?
29.Explain how a belt-driven cooling fan operates?
30.An engine coolant temperature switch or sensor is used to directly or indirectly energise the.
A. Blower motor.
B. Radiator fan motor relay.
C. Compressor clutch.
D. Dashboard warning light.
31.Many electric cooling fans are ultimately controlled by what device?
32.On some medium/heavy duty trucks, the ECM-controlled variable speed (VS) clutches can be either electromagnetically or pneumatically controlled and can be considered the more advanced of the currently available fan drive technologies. True or False:
33.In a cross-flow radiator, the coolant flow is from.
A. Top to bottom
B. One side to the other side
C. Diagonally
D. Bottom to top
34.Complete the following statement about radiators using the following words.Words: Aluminium, Cap, Coolant’s, Exchanger, Hot, Petcocks, Radiator, Top The radiator is a heat _, transferring heat from the engine to the air passing through it. The_ is a series of tubes and fins (collectively called the core) that expose the _ heat to as much surface area as possible. Attached to the sides or _ and bottom of the core are plastic or aluminium tanks. One tank holds __ coolant and the other holds the cooled coolant. Cores are normally comprised of flattened aluminium tubes surrounded by thin __ fins. The fins conduct the
36.What is the function of the radiator cap?
37.The cooling system pressure is regulated by the radiator cap? True or False:
38.The transmission cooler is a heat exchanger sealed in the radiator core? True or False:
39.Most cooling systems use an expansion or recovery tank. True or False:
40.Complete the following statement about expansion tanks using the following words.
Words: Coolant, Cooling, Expands, Expansion, Pressure, Shrink
All late-model _ systems have an expansion or recovery tank. These systems are called closed- cooling systems. They are designed to catch and hold any _ that passes through the pressure cap.
As the engine warms up, the coolant _. This eventually causes the pressure cap to release and allows some coolant to move into the _ tank. When the engine is shut down, the coolant begins to _. Eventually, the vacuum spring inside the _ cap opens and the coolant in the
expansion tank is drawn back into the cooling system.
41.Coolant flows from the engine to the radiator and from the radiator to the engine through radiator hoses. True or False:
42.A hose is typically made up of three (3) parts. What are they?
1
2
3
43.Cooling system hoses must be able to endure heavy vibrations and be resistant to oil, heat, abrasion, weathering and pressure. True or False:
44.What are drive belts (belt drives) used for in the cooling system?
45.What is the function of the temperature sensor in the cooling system?
46. The coolant temperature indicator alerts the driver of an overheating condition. These indicators are a temperature gauge and/or a warning light? True or False:
47.A voltmeter is used to check the cooling system?
48.Explain how corrosion occurs in the cooling system?
49.What is cavitation?
50.Complete the following statement about diagnosing electrolysis using the following words.
Words: Cranked, DMM, Electrolysis, Meter, Negative, Positive, Problem, Running, Voltage
To check for the conditions prone to _, use a voltmeter that is capable of measuring AC and DC voltage. Set the _ so it can read in tenths of a volt DC. Attach the _ meter lead to a good ground. Place the _ lead into the coolant. Look at the meter while the engine is _ with the starter and record the readings. Take another reading with the engine _ and all
accessories turned on. Record that reading. _ readings of 0 to 0.3 volt are normal for a cast-iron engine; normal readings for a bimetal or aluminium engine are half that amount. Repeat the test with the
_ in the AC voltage mode. There will be AC voltage if the __ is static electricity. Any readings above normal indicate a problem.
51.A hydrometer is used to measure the concentration of antifreeze in coolant. True or False:
AURTTC003 Diagnose And Repair Cooling Systems Assignment-Trinity Institute Australia.
52.A refractomer is used to measure the concentration of antifreeze in coolant True or False:
53.How and why are test strips used to evaluate coolant condition?
54.A cooling system pressure tester is used to test for leaks in the radiator, hoses, water pump, thermostat, and engine assembly. True or False:
55.When testing a radiator cap, with the rated pressure applied, the cap should hold that pressure for at least _.
A. 30 seconds
B. 1 minute
C. 5 minutes
D. 20 minutes
56.What are the requirements when a pressure cap is tested using a cooling system pressure tester?
57.When using a combustion gas leak check: the colour of the fluid turns from blue to __ if there are combustion gases in the coolant.
A. Red
B. Blue
C. Yellow
D. Green
58.Describe the process to check for combustion gas leakage into the cooling system.
59.Complete the following statement about diagnosing electric cooling fan using the following words.
Words: Blades, Cooling, Motor, Not, Problem, Reaches, Sequence
The action of the electric _ fan should be observed. However, before doing so, check the mounting of the fan assembly and the condition of the fan _. The fan should be energised when the A/C is turned on and when the coolant _ a specified temperature. If the fan does not turn on when it should, check the _. Do this by connecting the motor directly to the battery. If the motor runs, the _ is in the motor’s control circuit. Diagnosis of this problem should follow the prescribed_ given by the manufacturer. If the jumped motor does __ run, the problem is the fan
motor.
60.The operation of a thermostat can be observed with an infrared thermometer. True or False:
61.The thermostat is often the cause of overheating or poor heater performance. What other problems can a faulty thermostat cause?
62.If the thermostat is stuck closed, because it failed or because there is a steam pocket below the thermostat, coolant will not flow between the engine and the radiator; the engine will, therefore, quickly overheat? True or False:
63.You should carefully check all cooling hoses for what type of faults?
64.What is Electro chemical Degradation (ECD), and what effect does it have on rubber hoses?
65.Identify five (5) causes of water pump failure.
1
2
3
4
5
66.Two technicians are discussing a vehicle with an overheating problem. There are no leaks, internal or external. The belts are in good condition, and the radiator has been removed and flow tested. Everything appears to be in good condition. A new thermostat was installed, but it did not cure the problem. What could be the fault?
A. The impeller could be slipping on the water pump shaft.
B. The impeller blades could be corroded.
C. Both “the impeller could be slipping on the water pump shaft” and “the impeller blades could be corroded”
D. Neither “the impeller could be slipping on the water pump shaft” and “the impeller blades could be corroded”
67.If the engine overheats during long periods of idling but runs normally at highway speeds, the problem is most likely
A. Defective thermostat
B. Defective water pump
C. Defective cooling fan
D. Defective radiator
68.Two (2) problems with the water pump are normally?
1
2
69.When replacing a thermostat, the replacement should always have the same temperature rating as the original. True or False:
70.Complete the following statement about replacing the thermostat using the following words.
Words:
Markings on the thermostat normally _ which end should face toward the _. Regardless of the markings, the sensored end must always be installed toward the _. When replacing the their most at, also replace the _ that seals the thermostat in place and is positioned between the thermostat housing and the block. Make sure the mating __ on the housing and block are clean and free of old gasket material.
AURTTC003 Diagnose And Repair Cooling Systems Assignment-Trinity Institute Australia.
71.When replacing the water pump, always follow the procedure given by the manufacturer. True or False:
72.Describe the procedure to bleed the cooling system using “air bleeds”.
73.What is a vacuum fill system, and how does it refill the cooling system?
74.Which source of information will give you the most detail about diagnosing and repairing cooling systems on the vehicle you are working on?
A. Workshop manual
B. Owner’s manual
C. Google
D. Textbooks
75.Why is it very important that the Job Card is completed correctly?
The Job Card becomes a legal document. Service records are kept by the workshop to maintain the vehicle’s service history and for legal purposes.
AURTTC003 Diagnose And Repair Cooling Systems Assignment-Trinity Institute Australia.
ORDER Now This AURTTC003 Diagnose And Repair Cooling Systems Assignment And Get Instant Discount
