Elements and Performance Criteria

RANGE STATEMENT
The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Sources of informationmay include:
workplace service information
automotive engine mechanical texts
vehicle workshop manuals
service bulletins
magazine technical articles.
Petrol and diesel engine operation may include:
engine construction
engine types and configuration
two-stroke and four-stroke
cycles of engine operation, including:
intake stroke
compression stroke
power stroke
exhaust stroke
firing order
ignition types, including:
spark
compression
engine mounting location, including:
front longitudinal
front transverse
mid transverse
measurement and performance, including:
bore and stroke
displacement
compression ratio
engine efficiency
torque versus horsepower.
Engine componentsmay include:
top of engine, including:
timing belt or chain
camshaft timing pulley
camshaft single and dual
rocker arms and shafts
intake valves and springs
exhaust valves and springs
cylinder head
front of engine, including:
crankshaft
crankshaft timing pulley
crankshaft pulley and balancer
rear of engine, including:
flywheel
starter ring gear
bottom of engine, including:
engine block
crankshaft
crankshaft balance weights
crankshaft main bearing journals
pistons
connecting rods.
Relationships may include:
ignition system:
ignition timing
top dead centre (TDC)
electrical sensors
spark plugs
glow plugs
fuel injectors
knock sensors
starter motor system
charging system
coolant temperature sensor
air intake
fuel delivery
exhaust emission
engine oil lubrication system.

EVIDENCE GUIDE
The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria, required Skills and Knowledge, the Range Statement and the Assessment Guidelines for the Training Package.
Overview of assessment

Critical aspects for assessment and evidence required to demonstrate competency in this unit
The evidence required to demonstrate competency in this unit must be relevant to workplace operations and satisfy all of the requirements of the performance criteria and required skills and knowledge.
A person who demonstrates competency in this unit must be able to apply and demonstrate knowledge of:
location of relevant sources of information on petrol and diesel engine components, systems and principles of operation
operating principles of petrol and diesel engine systems and components
various engine types and layouts in petrol and diesel powered vehicles
relationship that a four-stroke cycle petrol and diesel engine has with the vehicle’s ignition, starting, air and fuel delivery and cooling systems.
Context of, and specific resources for assessment
Competency is to be assessed in the workplace or a simulated workplace environment that accurately reflects performance in a real workplace setting.
Assessment is to occur:
using standard workplace practices and procedures
following safety requirements
applying environmental constraints.
Assessment is to comply with relevant:
regulatory requirements
Australian standards
industry codes of practice.
The following resources must be made available for the assessment of this unit:
technical reference library with various information resources
a range of engine components, systems and assemblies
a range of petrol and diesel engine types and configurations mounted on an engine stand for ease of viewing
functioning light vehicle or vehicles
automotive tools and test equipment
personal protective equipment and workplace safety equipment.
Method of assessment
Assessment must satisfy the endorsed Assessment Guidelines of this Training Package.
Assessment methods must confirm consistency and accuracy of performance (over time and in a range of workplace relevant contexts) together with the application of required skills and knowledge.
Assessment methods must be by direct observation of tasks and include questioning on required skills and knowledge to ensure correct interpretation and application.
Competence in this unit may be assessed in conjunction with other units which together form part of a holistic work role.
Where applicable, reasonable adjustment must be made to work environments and training situations to accommodate the needs of diverse clients.
Assessment processes and techniques must be culturally sensitive and appropriate to the language, literacy and numeracy capacity of the candidate and the work being performed.