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Evidence Guide: MARL057 - Demonstrate basic knowledge of marine diesel engines and systems

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

MARL057 - Demonstrate basic knowledge of marine diesel engines and systems

What evidence can you provide to prove your understanding of each of the following citeria?

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

  1. Two-stroke and four-stroke cycle diesel engines are compared and contrasted
Two-stroke and four-stroke cycle diesel engines are compared and contrasted

Completed
Date:

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Methods and diagnostic information used in determining engine combustion characteristics are specified

Completed
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Diagnostic information is used to identify and interpret common combustion faults and to produce typical diagrams for analysing faults

Completed
Date:

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Explain means of pressure-charging diesel engines

  1. Pressure-charging principles and their influence on engine design and waste heat recovery are explained
Pressure-charging principles and their influence on engine design and waste heat recovery are explained

Completed
Date:

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Different methods of pressure-charging diesel engines are clarified

Completed
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Emergency isolation procedures used when pressure-charging diesel engines are clarified

Completed
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Explain operation of diesel engine governors

  1. Governing principles, common governor types and related controls are outlined
Governing principles, common governor types and related controls are outlined

Completed
Date:

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Different requirements for governing diesel engines for propulsion and power generation are explained

Completed
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Problems of mismatched engine sizes/prime mover types when sharing common loads are outlined

Completed
Date:

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Explain properties of materials used in construction of engine components

  1. Properties of materials used in construction of engine components are specified
Properties of materials used in construction of engine components are specified

Completed
Date:

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Dynamic stresses and loads, materials and service limitations of engine components are outlined

Completed
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Construction and operating cycle forces of diesel engine components are outlined

Completed
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Relationship between critical speed, use of detuners/dampers and materials in engine components is clarified

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

  1. Safe practices for isolating propulsion and power generation diesel engines prior to work commencement are confirmed
Safe practices for isolating propulsion and power generation diesel engines prior to work commencement are confirmed

Completed
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Personal protective (PPE) to be used during all aspects of diesel maintenance is identified

Completed
Date:

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Hazards associated with working on diesel engines and systems, including working in enclosed spaces, are identified

Completed
Date:

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Correct procedures for using hydraulic tools and high-pressure fuel injection test equipment are clarified

Completed
Date:

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Purpose, operation and maintenance of safety interlocks and protective cut-outs of engine manoeuvring systems is determined

Completed
Date:

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

  1. Causes, symptoms and means of preventing and extinguishing uptake and economiser fires are outlined
Causes, symptoms and means of preventing and extinguishing uptake and economiser fires are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Risks of continued service with an isolated waste heat unit are assessed

Completed
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Causes, symptoms, methods of extinguishing and prevention of scavenge fires are evaluated

Completed
Date:

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Causes and hazards associated with starting air-line explosions are identified

Completed
Date:

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Protective devices fitted to air starting systems to minimise risk of explosion, and routine inspection and maintenance required are detailed

Completed
Date:

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Causes and ways of preventing crankcase explosions in both diesel and dual-fuel engines are outlined

Completed
Date:

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Procedure 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

Completed
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Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria on at least one occasion and include:

accessing diagnostic information related to marine diesel engines and systems

assessing own work outcomes and maintaining knowledge of current codes, standards, regulations and industry practices

explaining basic operation of marine diesel engines and systems

identifying causes associated with starting air-line explosions, including:

airlock in feed water system

cleanliness of economiser tubes

failure of economiser feed pump

loss of feed water supply

identifying and applying relevant solutions for addressing problems associated with marine diesel engines and systems

identifying and interpreting diagnostic information, and performing mathematical calculations related to operating, maintaining and repairing marine diesel engines and systems

identifying methods, procedures and materials needed for operating, maintaining and repairing marine diesel engines and systems

imparting knowledge and ideas through verbal, written and visual means

providing accurate and reliable information

providing appropriate level of detail in responses

reading and interpreting manuals, technical specifications, safety data sheets (SDS)/material safety data sheets (MSDS) and manufacturer guides related to operating, maintaining and repairing marine diesel engines and systems.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of:

basic principles of diesel engine operation, including:

basic construction

engine principles

engine types

fuel atomisation and combustion

heat-engine cycle

ideal gas cycle

common combustion faults, including:

engine cylinder fuel supply

lack of total combustion

components of diesel engines

crankcase and air-line explosions, scavenge and uptake fires

diesel engine, including:

medium speed and high-speed diesel engine

slow-speed diesel engine

diesel engine:

lubrication systems

propulsion and power generation

diagnostic information, including:

engine efficiency

fuel consumption

temperature

hazards, including:

acids

chemicals

defective or bypassed machinery protective devices

defective or inappropriately adjusted exhaust systems

enclosed spaces

flammable liquids under pressure

hydrocarbons

leaking oil and fuel

lifting heavy components both unaided and with lifting gear

manoeuvring systems of diesel engines

methods of pressure-charging diesel engines, including:

exhaust gas turbocharging

positive displacement engine-driven blowers

under-piston assistance

pressure-charging diesel engines, including common service faults, actions to rectify faults, emergency operation and isolation procedures

properties and characteristics of fires

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

starting methods of diesel engines

work health and safety (WHS)/occupational health and safety (OHS) legislation, policies and procedures.

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.