MARL6014A - Demonstrate intermediate knowledge of marine diesel engines and systems
Assessor Resource
MARL6014A Demonstrate intermediate knowledge of marine diesel engines and systems
Assessment tool
Version 1.0 Issue Date: March 2024
This unit applies to the work of a Marine Engineer Class 2 on commercial vessels greater than 3000 kW and forms part of the requirements for the Certificate of Competency Marine Engineer Class 2 issued by the Australian Maritime Safety Authority (AMSA).
This unit involves the skills and knowledge required to operate and maintain marine diesel engines and systems on a commercial vessel. This includes evaluating diesel fuel systems, methods of diesel engine cooling, diesel engine lubrication requirements, propulsion methods and faults using combustion diagnostic equipment.
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:
providing accurate and reliable information
providing appropriate level of detail in responses.
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 intermediate knowledge of marine diesel engines and systems can be demonstrated
diagrams, specifications and other information required for performing basic calculations related to marine diesel engines and systems
technical reference library with current publications on marine diesel engines and systems
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.
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 demonstrating intermediate knowledge of marine diesel engines and systems
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:
Access diagnostic information related to marine diesel engines and systems
Assess own work outcomes and maintain knowledge of current codes, standards, regulations and industry practices
Explain operation of marine diesel engines and systems
Identify and apply relevant solutions for addressing problems associated with marine diesel engines and systems
Identify and interpret diagnostic information, and perform mathematical calculations related to operating, maintaining and repairing marine diesel engines and systems
Identify methods, procedures and materials needed for operating, maintaining and repairing marine diesel engines and systems
Impart knowledge and ideas through verbal, written and visual means
Read and interpret manuals, technical specifications, safety data sheets/material safety data sheets and manufacturer guides related to operating, maintaining and repairing marine diesel engines and systems
Required Knowledge:
Chemical and physical properties of fuels and lubricants
Components of diesel engines
Crankcase and air-line explosions, scavenge and uptake fires
Diesel engine lubrication systems
Diesel engine propulsion and power generation
Manoeuvring systems of diesel engines
Pressure charging diesel engines, including common service faults, actions to rectify faults, emergency operation and isolation procedures
Principles of diesel engine operation
Properties and characteristics of fires
Safe working practices associated with diesel engines during operation, repair and maintenance
Starting methods of diesel engines
WHS/OHS legislation, policies and procedures
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.
Methods of component fabrication may include:
Ceramics
Composite
Forged
Laser-hardening
Plasma-spraying
Welded
Accessories may include:
Accessory gear
Lube oil:
cooler
pump
filter
Starting devices
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
Why atomisation and penetration of fuel and air turbulence are essential to optimum combustion is explained
Typical injection pressures and viscosities for different grades of fuel are stated
Design modifications of pumps, camshafts and injectors for fuel types are outlined
Difference between constant and variable injection fuel pump timing, showing materials, principal parts, method of operation and adjustments of common pump types is explained
Injection requirements for slow speed and high speed diesel engines are compared, including pilot injection and pre-combustion chambers
Common service faults, symptoms and causes of diesel fuel injection problems are identified, specifying appropriate adjustments, including methods of fuel pump timing
Work health and safety (WHS)/occupational health and safety (OHS) requirements for handling and testing fuel injection systems are explained
Normal operating pressures and temperatures for fuel valve cooling arrangements, and uni-fuel and dual-fuel systems, including both high/medium viscosity fuel types are explained
Importance of maintaining diesel engine thermal efficiency and evaluate thermal loads on engine components is outlined
Cooling media selection is justified, and advantages and disadvantages of different diesel cooling methods are outlined
Appropriate action to be taken with common faults in cooling systems is explained and different cooling water treatments are compared
How cooling systems are commissioned, stored during idle periods and restored after contamination is confirmed
Methods of load-dependent cooling of diesel alternators on heavy fuels are evaluated
Normal operation temperatures, pressures, and methods of cooling medium and slow speed diesel engine pistons, exhaust valves, cylinders, turbochargers and cylinder heads are identified
Principles of engine lubrication are outlined
Lubricant types, physical and chemical properties and applications are assessed
Sources of diesel lubricant contamination and deterioration are identified
Ways of testing for diesel lubricant contamination and deterioration, interpreting test results and identifying appropriate action to be taken are outlined
Distribution of lubricating oil to guides, top-end, bottom-end and main bearings of diesel engines, showing direction of flow, typical clearances and stating normal operating temperatures and pressure is explained
Principles of bearing lubrication are outlined
Materials used in bearing construction are identified
Bearing faults are evaluated and remedies to prevent them from occurring are determined
Starting procedures of diesel engines for power generation, propulsion, and emergency use are clarified
Starting and manoeuvring requirements/sequences for direct-coupled reversible and geared propulsion diesels, including CPP applications are explained
Common faults are analysed and appropriate action to be taken with typical diesel starting and manoeuvring systems is identified
Manoeuvring and reversing systems of propulsion diesel engines are outlined
Different methods of achieving reversing capability with direct-coupled propulsion diesels are compared
Layout of a diesel-electric drive is compared and contrasted with the layout of a turbo electric drive
Common materials used in diesel engine construction are assessed, selection is justified, and typical compositions and physical properties of components are specified
Dynamic stresses and loads are interpreted, service limitations are identified and different methods of component fabrication are evaluated
Two-stroke and four-stroke operating cycle forces, couples and moments, relating to design principles of crankshafts, bedplates, foundations and crossheads are outlined
Out-of-balance gas and inertia forces, couples and moments are related to flywheels, balance weights and first/second order balancing
Factors contributing to torsional vibration are explained and methods of minimising or eliminating harmful effects of critical speeds are clarified
Pistons, liners, piston rings, bearings and crankshafts are calibrated to identify wear patterns, limits and means of correction
Alignment and adjustment criteria of crankshafts, chain-drives, integral thrust bearings and crossheads are specified
Specified working clearances and limits of all bearings, sliding surfaces and interference fits of typical diesel engines are compiled using engine builder manuals
Design and operational factors that contribute to fires in waste heat units are explained and methods of extinguishing and/or containing soot and hydrogen fires are specified
Routine cleaning procedures, inspection criteria, symptoms of fire and risks of isolation in service associated with waste heat units are identified
Operational factors that contribute to scavenge fires are identified, symptoms are outlined, methods of extinguishing are evaluated and routine inspection criteria of scavenge spaces are stated
Principles of explosive mixtures are clarified and how a starting airline explosion can occur is explained
How risk of scavenger fires may be minimised in service by protective devices and routine evaluation of starting air systems is clarified
Causes of gearbox and crankcase explosions in propulsion and auxiliary drives are outlined
How risks of gearbox and crankcase explosions may be minimised in service are explained and correct procedures to be taken in the event of warning of a hazardous atmosphere in both oil and dual-fuel engines are clarified
Operating principles of an oil-mist detector, crankcase breather and explosion relief doors are explained
Function of a piston rod scraper box is outlined, and causes of wear and appropriate adjustments are identified
Safe working practices associated with isolating main and propulsion diesels under all emergency and routine situations are explained, including use of protective devices, interlocks and evaluation of their status
Safe working practices associated with working in crankcases and other enclosed spaces are explained
Safe working practices associated with safe handling of hydraulic tools and dangers of lifting/isolating heavy components both unaided and with lifting gear are explained
Hazards of working with flammable liquids under pressure, chemicals, acids and hydrocarbons as well as selection criteria for appropriate protective clothing are explained
Safe working strategies for diesel engine maintenance are planned using engine manufacturer instruction manuals and product data safety sheets
Two-stroke and four-stroke theoretical cycle diagrams are compared with results recorded using diagnostic tools
Combustion faults from typical diagrams are evaluated and corrective adjustments are specified
Service combustion values are compared with trials or test bed figures
Common faults associated with pressure charging and fuel injection systems are outlined
Methods of pressure charging diesel engines are compared, and materials of construction, design features, operational maintenance and emergency procedures are correctly identified
Causes of efficiency loss and surge are explained
Scavenging systems and gas/air flow paths through a turbocharger, under normal and emergency operation modes are explained using relevant diagrams
Flow of air and gas through a simple cycle marine gas turbine is analysed
Materials and construction of compressor, combustion system and turbine in single and two shaft designs are outlined
Controls required for control and protection of marine gas turbines are detailed
Function of accessories necessary for safe operation of marine gas turbines are explained
Forms
Assessment Cover Sheet
MARL6014A - Demonstrate intermediate knowledge of marine diesel engines and systems
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Assessment Record Sheet
MARL6014A - Demonstrate intermediate knowledge of marine diesel engines and systems
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Assessment task 1: [title] Result: Competent Not yet competent
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