MARL057 — Demonstrate basic knowledge of marine diesel engines and systems

1 Outline stages of combustion in two-stroke and four-stroke cycle diesel engines

• 1.1Two-stroke and four-stroke cycle diesel engines are compared and contrasted
• 1.2Methods and diagnostic information used in determining engine combustion characteristics are specified
• 1.3Diagnostic information is used to identify and interpret common combustion faults and to produce typical diagrams for analysing faults

2 Explain means of pressure-charging diesel engines

• 2.1Pressure-charging principles and their influence on engine design and waste heat recovery are explained
• 2.2Different methods of pressure-charging diesel engines are clarified
• 2.3Emergency isolation procedures used when pressure-charging diesel engines are clarified

3 Explain operation of diesel engine governors

• 3.1Governing principles, common governor types and related controls are outlined
• 3.2Different requirements for governing diesel engines for propulsion and power generation are explained
• 3.3Problems of mismatched engine sizes/prime mover types when sharing common loads are outlined

4 Explain properties of materials used in construction of engine components

• 4.1Properties of materials used in construction of engine components are specified
• 4.2Dynamic stresses and loads, materials and service limitations of engine components are outlined
• 4.3Construction and operating cycle forces of diesel engine components are outlined
• 4.4Relationship between critical speed, use of detuners/dampers and materials in engine components is clarified

5 Explain safe working practices associated with diesel engines during maintenance, repair and operation

• 5.1Safe practices for isolating propulsion and power generation diesel engines prior to work commencement are confirmed
• 5.2Personal protective (PPE) to be used during all aspects of diesel maintenance is identified
• 5.3Hazards associated with working on diesel engines and systems, including working in enclosed spaces, are identified
• 5.4Correct procedures for using hydraulic tools and high-pressure fuel injection test equipment are clarified
• 5.5Purpose, operation and maintenance of safety interlocks and protective cut-outs of engine manoeuvring systems is determined

6 Explain procedures for preventing and responding to crankcase and air-line explosions, and scavenge and uptake fires

• 6.1Causes, symptoms and means of preventing and extinguishing uptake and economiser fires are outlined
• 6.2Risks of continued service with an isolated waste heat unit are assessed
• 6.3Causes, symptoms, methods of extinguishing and prevention of scavenge fires are evaluated
• 6.4Causes and hazards associated with starting air-line explosions are identified
• 6.5Protective devices fitted to air starting systems to minimise risk of explosion, and routine inspection and maintenance required are detailed
• 6.6Causes and ways of preventing crankcase explosions in both diesel and dual-fuel engines are outlined
• 6.7Procedure to be taken in the event of an early warning of a hazardous crankcase atmosphere and required procedure to be followed after engine has stopped are clarified

What does an assessment tool for MARL057 need to cover?

To satisfy the Principles of Assessment and Rules of Evidence, an assessment for MARL057 needs to address all 77 unit components: 6 elements with 25 performance criteria, 10 performance evidence requirements, 42 knowledge evidence requirements, and the foundation skills. A coverage matrix mapping each question and task to these components is what an auditor looks for.

How does Auditori generate an assessment tool for MARL057?

Auditori pulls the current release of MARL057 from training.gov.au and generates a complete package: candidate assessment, assessor guide with model answers and observation criteria, and a coverage matrix mapping every component. A suitably qualified person then reviews and approves the draft in a built-in workflow — consistent with ASQA's guidance on AI use in VET — before export as branded PDF and editable Word.

Is the first assessment tool really free?

Yes. Every new account includes one free credit — enough to generate the complete assessment tool for MARL057 — with no card and no subscription required. After that it's pay-as-you-go per unit.

Can I check my existing MARL057 assessment instead of generating a new one?

Yes — upload your existing assessment or learner guide and Auditori maps it against every element, performance criterion, PE and KE of MARL057, showing exactly what's covered and what's missing. Mapping costs a quarter of a credit.