The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, 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 demonstrate knowledge of:

engine components

engine layouts

operating principles of a range of engine types

common diagnosis procedures.

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. Performance is demonstrated consistently over a period of time and in a suitable range of contexts.

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:

appropriate worksite

a range of engine types and configurations.

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 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 its correct interpretation and application.

Assessment must confirm that competency is able not only to be satisfied under the particular circumstance, but is able to be transferred to other circumstances.

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 ethnicity, age, gender, demographics and disability.

Assessment processes and techniques must be culturally sensitive and appropriate to the language and literacy capacity of the candidate and the work being performed.

Required skills

technical skills to use diagnostic equipment

literacy skills to read and interpret written technical information

learning skills to identify sources of information, assistance and expert knowledge to expand knowledge, skills and understanding

numeracy skills to use mathematical ideas and techniques to calculate distances, areas, volumes, power and torque

problem-solving skills to seek information and assistance as required to solve problems

self-management skills to:

follow workplace documentation, such as codes of practice and operating procedures

select and use appropriate equipment, materials, processes and procedures

Required knowledge

classifications of engines, including:

internal and external combustion

rotary and reciprocating engines

spark ignition and compression ignition engines

engine cylinder arrangements

engine configurations, including:

inline engines, vee-type engines and slant cylinder engines

opposed cylinder engines

camshaft and valve locations, including:

overhead cam (OHC)

overhead valve (OHV)

engine operating principles, including:

combustion, including:

air-fuel ratios and flame propagation

direct and indirect fuel injection

detonation and pre-ignition

two-stroke and four-stroke cycles

engine measurement and performance, including:

bore and stroke, including:

oversquare and undersquare engines

crank throw

swept volume and engine volume

compression ratio

engine efficiency, including volumetric efficiency, thermal efficiency and mechanical efficiency

torque and horsepower, including brake horsepower

construction and operation of petrol engines, including:

basic metallurgy relating to engines

identification of metric and imperial threads

engine components, including cylinder blocks, cylinders, pistons, cylinder heads, combustion chambers, inlet and exhaust manifolds, spark plugs, connecting rods, crankshafts, piston rings, gudgeon pins, camshafts, cams and flywheels

combustion chambers, including:

L-head, bath-tub, wedge, trapezoidal, hemispherical and heron-type shapes

multiple valve designs

construction and operation of diesel engines, including:

direct and indirect injection

swirl chambers

pre-combustion chambers

engine diagnosis, including:

wet and dry compression tests

cylinder leakage tests

cylinder power balance tests

vacuum tests

oil pressure tests

sources of fluid leaks

exhaust smoke diagnosis

engine noise diagnosis, including identifying:

common engine noises

common abnormal combustion noises

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.

Components may include

components of a rotary engine

components of a spark ignition or compression ignition engine.

Relationships may include

where a component has an effect on another component, such as piston to connecting rod to crankshaft to flywheel.