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

A person who demonstrates competency in this unit must be able to select a wide variety of mechanical machine and equipment components for safety, economy and fitness for purpose. Selections must be able to be justified through appropriate engineering analysis.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessors must be satisfied that the candidate can competently and consistently:

determine component arrangement, limits, fits and clearances, assembly, fastening and alignment of components

investigate sustainability implications of components selection task

review features and functions of machine and equipment components, design loads, working stresses, allowable deformations and factor of safety

select and specify machine components, including arrangement and assembly requirements

evaluate machine components and arrangements for compliance with WHS and regulatory requirements and risk assessment

report and document results.

Context of and specific resources for assessment

This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, then a simulated working environment must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team.

Where applicable, reasonable adjustment must be made to work environments and training situations to accommodate ethnicity, age, gender, demographics and disability.

Access must be provided to appropriate learning and/or assessment support when required. Where applicable, physical resources should include equipment modified for people with disabilities.

Method of assessment

Assessment must satisfy the endorsed Assessment Guidelines of the MEM05 Metal and Engineering 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 underpinning knowledge.

Assessment methods must be by direct observation of tasks and include questioning on underpinning knowledge to ensure correct interpretation and application.

Assessment may be applied under project-related conditions (real or simulated) and require evidence of process.

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

Assessment may be in conjunction with assessment of other units of competency where required.

Guidance information for assessment

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

Required skills

Required skills include:

applying safe working practices and procedures when working with machines and equipment

component arrangement, limits, fits and clearances, assembly, fastening and alignment methods

investigating sustainability implications of machine development, manufacture and use

reviewing features and functions of machines and components

identifying design features of machines, equipment and components, including:

loads

working stresses

allowable deformations and factor of safety

component arrangements

limits and fits

assembly, adjustment and fastening methods

identifying relevant analysis support, such as graphs, tables, nomograms or computer-aided solutions and validation techniques

selecting and specifying machine and equipment components, arrangement and assembly requirements

communicating with stakeholders, professionals and technicians

identifying and complying with relevant WHS and regulatory requirements and risk assessment procedures

reporting and documenting results of component selection, including calculations, specifications, diagrams and drawings

Required knowledge

Required knowledge includes:

WHS and regulatory requirements, codes of practice, standards and risk management requirements relevant to mechanical component selection processes

current options and trends in performance analysis software, including underpinning program techniques and software validation techniques

conditions for equilibrium

reactions at beam supports (e.g. simply supported, overhung and cantilever beam with vertical and oblique concentrated, uniform and variable distributed loads and couples)

shear force and bending moments, including diagrams

vertical and oblique concentrated and uniform and variable distributed loads

bending and shear stresses

torsion distribution diagrams

combined stresses

properties of common machine and component materials

stress concentration and fatigue due to alternating stresses

deflection of beams

bolted and welded connections with central loads (bolted joints may include friction forces)

static versus dynamic forces, balanced and unbalanced

dynamics and laws of rotational motion

work and forms of mechanical energy and power

dynamic systems

mechanical power and drive efficiency

mechanical drives

block, band and disk brakes and clutches with single contact surface

mechanical couplings and devices

dynamic balancing of rotating masses

stresses in flywheels

stresses in thin walled pressure vessels

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, if used 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.

Machine and equipment components

Machine and equipment components for this unit are limited to components peforming mechanical functions. Examples include:

shafts

bearings

couplings

power screws

gear drives

spur gears

chain and belt drives

brakes

clutches

Standards and codes

Standards and codes refer to all relevant Australian and international standards and codes applicable to a particular selection of mechanical machine and equipment components task

Appropriate licensed technical and professional assistance

Appropriate licensed technical and professional assistance may include:

technical support and advice relating to elements which have intrinsic dangers, such as:

high pressure

energised fluid vessels

high temperatures and heat energy capacity

wiring with high current control voltages above extra low voltage

professional support for technologies, such as:

specialist electric motor drives and controllers

specialist materials, plastics, metal alloys and nano materials

special processes, foundry, alloy welding, heat treatment, sealing and fastening

Sustainability implications

Sustainability is used to mean the entire sustainable performance of the organisation/plant, including:

meeting all regulatory requirements

conforming to all industry covenants, protocols and best practice guides

minimising ecological and environmental footprint of process, plant and product

maximising economic benefit of process plant and product to the organisation and the community

minimising the negative WHS impact on employees, community and customer

Analysis of machine and components

Analysis of machine and equipment components may include:

static and dynamic analysis of loads

the stresses and deformations resulting

the transmitted power, torque and speed

machine/operator interface in terms of ergonomics and safety

environmental effects, including noise, energy efficiency, heat generation and dust generation

graphical and mathematical methods and software options

Appropriate computer-aided solutions and validation techniques

Appropriate computer-aided solutions include:

performance analysis and computer-aided design (CAD) modelling

Validation techniques include:

comparison of traditional solutions for simple design problems with software solutions to the same design problems

review of previously implemented design challenges which were completed using the software