Assessor Resource

MARL6005A
Apply advanced principles of marine electrotechnology

Assessment tool

Version 1.0
Issue Date: March 2024


This unit applies to the work of a Marine Engineer Class 1 on commercial vessels of unlimited propulsion power and forms part of the requirements for the Certificate of Competency Marine Engineer Class 1 issued by the Australian Maritime Safety Authority (AMSA).

This unit involves the skills and knowledge required to explain advanced marine electrotechnology principles and to perform advanced electrical calculations.

You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)

Prerequisites

Not applicable.


Employability Skills

This unit contains employability skills.




Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, the required skills and knowledge, the range statement and the Assessment Guidelines for the Training Package.

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

The evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the Elements, Performance Criteria, Required Skills, Required Knowledge and include:

making accurate and reliable calculations

solving problems using appropriate laws and principles.

Context of and specific resources for assessment

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

Resources for assessment include access to:

industry-approved marine operations site where advanced principles of marine electrotechnology can be applied

electrical diagrams, specifications and other information required for performing advanced electrical calculations

technical reference library with current publications on marine electrotechnology

tools, equipment and personal protective equipment currently used in industry

relevant regulatory and equipment documentation that impacts on work activities

range of relevant exercises, case studies and/or other simulated practical and knowledge assessments

appropriate range of relevant operational situations in the workplace.

In both real and simulated environments, access is required to:

relevant and appropriate materials and equipment

applicable documentation including workplace procedures, regulations, codes of practice and operation manuals.

Method of assessment

Practical assessment must occur in an:

appropriately simulated workplace environment and/or

appropriate range of situations in the workplace.

A range of assessment methods should be used to assess practical skills and knowledge. The following examples are appropriate to this unit:

direct observation of the candidate applying advanced principles of marine electrotechnology

direct observation of the candidate applying relevant WHS/OHS requirements and work practices.

Guidance information for assessment

Holistic assessment with other units relevant to the industry sector, workplace and job role is recommended.

In all cases where practical assessment is used it should be combined with targeted questioning to assess Required Knowledge.

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


Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assingnment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)


Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

Required Skills:

Assess own work outcomes and maintain knowledge of current codes, standards, regulations and industry practices

Explain advanced principles of marine electrotechnology

Identify and apply relevant mathematical formulas and techniques to solve complex problems related to marine electrotechnology

Identify and interpret numerical and graphical information, and perform mathematical calculations to perform tasks such as using phasor diagrams and mathematical expressions to explain the effects of loads and excitation on synchronous motors

Identify, collate and process information required to perform complex calculations related to marine electrotechnology

Impart knowledge and ideas through verbal, written and visual means

Read and interpret written information needed to perform complex electrical calculations

Use calculators to perform complex mathematical calculations

Required Knowledge:

AC principles

Circuits:

resistance

inductance

capacitance

Complex number theory

DC generators

DC motors

Difference between AC and DC

Electrical:

circuits

current

power

safety

units of measurement

Electromagnetic:

force

induction

Electrical meters:

energy meters

frequency meters

induction disc watt meters

power factor meters

Ohm’s Law

Operating principles of:

DC generators

DC motors

electrical instrumentation

Parallel circuits

Parallel operation of AC and DC generators

Power factor

Power factor correction mechanisms

Resistance

Single and threephase transformers

Synchronous motors and generators

Work health and safety (WHS)/occupational health and safety (OHS) requirements and work practices

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.

Electrical meters may include:

Energy meters

Frequency meters

Induction disc watt meters

Power factor meters

Problems may include:

Tapping point

Turns

Voltages

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Mathematical problems involving RL and RC combinations in direct current (DC) circuits are solved 
Mathematical problems involving resistive, inductive and capacitive reactance and overall circuit impedance in alternating current (AC) circuits are solved 
Why large power factors are desirable in AC circuits is explained 
Mathematical problems related to power factor correction mechanisms are solved 
Conditions for resonance in series and parallel RLC circuit combinations are analysed 
Mathematical problems involving resonance in series and parallel RLC circuit combinations are solved 
Differing consequences of resonance to both RLC series and RLC parallel circuit are illustrated 
J operator is explained 
Rectangular notation of j operator is related to comparable trigonometric and polar notations 
J operator is used in the addition and subtraction of phasors, applying the most appropriate notation to the solution of phasor problems involving current, voltage and impedance 
Conductance, admittance and susceptance are distinguished from each other in terms of resistance, impedance and the j operator 
Problems involving RL and C elements in different circuit combinations using j operator theory are solved 
Power in AC circuit applications using j operator theory is calculated 
Mathematical calculations are performed to demonstrate how moving coil and moving iron instruments may have their ranges changed 
Mathematical calculations are performed to demonstrate how dynamometer type wattmeters may have their measuring ranges extended 
Construction, operating principles and functions of electrical meters are outlined 
Principal methods and instruments used in resistance measurement are detailed 
Resistance measurements are conducted and verified using appropriate electrical instrumentation 
EMF equation is applied to solve problems related to DC generators 
Losses that may occur in DC generators are analysed 
Appropriate parametric relationships for DC generator losses, together with expressions for output power and efficiency are derived and associated numerical problems are solved 
Basic principles of DC armature winding techniques are explained 
Generator armature reaction is explained 
Expression for armature EMF is derived and applied to solve problems related to DC generators 
Commutator arcing and how this might be minimised or eliminated is explained 
Open circuit and load characteristic curves for separately excited, shunt, and compound wound DC generators are derived 
DC torque equation is applied to solve problems related to DC motors 
Losses that may occur in DC motors are analysed 
Appropriate parametric relationships for DC motor losses, together with expressions for output power and efficiency are derived and associated numerical problems are solved 
Speed equation for a DC motor is derived and corresponding characteristics for different winding configurations are sketched 
Speed equation and characteristics of different DC motor configurations are applied to explain how DC motor speed may be controlled 
Reasons for armature reaction and methods of compensating for its effects are identified 
Why DC motors need variable starting resistors are explained 
Marine applications of synchronous motors and generators are identified 
Mathematical expression for the magnitude and rotational speed of the magnetic field produced by a three-phase supply is derived 
Operating principle of synchronous motors is explained 
Operation of synchronous motors and generators are compared and contrasted 
Problems using phasor diagrams and mathematical expressions involving the effects of loads and excitation on synchronous motors are solved 
Advantages and disadvantages of AC synchronous motors and generators are analysed 
Basic transformation ratio and EMF equation for an ideal transformer is derived 
No load and on load phasor diagrams for an ideal transformer are constructed, with negligible voltage drop through its windings 
Causes of actual transformer losses are explained and relationships associated with the transformer equivalent circuit are derived 
Open circuit and short circuit tests are applied to calculate transformer efficiency and voltage regulation 
Problems related to the operation of auto-transformers are solved 
Conditions required for shunt, series and compound wound DC generators to operate in parallel are identified 
Numerical problems related to parallel operation of shunt, series and compound wound DC generators are solved 
Conditions required for AC generators to operate in parallel are identified 
Numerical problems related to parallel operation of AC generators are solved 

Forms

Assessment Cover Sheet

MARL6005A - Apply advanced principles of marine electrotechnology
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Assessment Record Sheet

MARL6005A - Apply advanced principles of marine electrotechnology

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Assessment task 1: [title] Result: Competent Not yet competent

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