MARL5010A - Demonstrate basic knowledge of marine steam turbines and main boilers
Assessor Resource
MARL5010A Demonstrate basic knowledge of marine steam turbines and main boilers
Assessment tool
Version 1.0 Issue Date: May 2024
This unit applies to the work of Marine Engineering Watchkeepers on commercial vessels greater than 750 kW and forms part of the requirements for the Certificate of Competency Marine Engineer Watchkeeper issued by the Australian Maritime Safety Authority (AMSA).
This unit involves the knowledge required to operate and maintain main steam propulsion plant and associated control systems on a commercial vessel.
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 basic knowledge of marine steam turbines and main boilers can be demonstrated
diagrams, specifications and other information required for performing basic calculations related to marine steam turbines
technical reference library with current publications on basic marine steam turbines
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 basic knowledge of marine steam turbines and main boilers
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 steam turbines
Assess own work outcomes and maintain knowledge of current codes, standards, regulations and industry practices
Explain basic operation of marine steam turbines, and
Identify and apply relevant solutions to problems that can occur when operating steam propulsion plant and associated systems on a steam vessel
Identify and interpret diagnostic information, and perform mathematical calculations related to operating, repairing and maintaining marine steam turbines
Identify methods, procedures and materials needed for operating, maintaining and repairing marine steam turbines
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 steam turbines
Required Knowledge:
Basic principles of operation of main steam propulsion and auxiliary systems on a steam vessel, including:
methods of turbine control, including safety devices
symptoms, causes, effects, and actions to be taken with defects of auxiliary steam turbines
construction and operation of main and auxiliary steam turbines
procedures for emergency operation of a steam turbine
Established engineering practice and procedures for operating shipboard steam propulsion plant and associated systems in warm-through, manoeuvring, start up, normal running, emergency and shut down situations
Fundamental principles of steam propulsion systems and boilers
Hazards and problems that can occur when operating steam propulsion plant and associated systems, and appropriate preventative and remedial action
Methods of lubricating the principal components of a marine steam propulsion turbine and its associated gearing, and evaluating common faults, including common lubrication faults, symptoms, causes, and actions to be taken with such faults
Operational characteristics and performance specifications for different types of steam propulsion plant and associated systems on a steam vessel of unlimited propulsion power
Procedures for reading, interpretation of readings, and indications of the performance of steam propulsion plant and associated systems
Typical operating precautions for steam propulsion plant and associated systems to ensure operational performance is in compliance with bridge orders, technical specifications, survey requirements and established safety and anti-pollution rules and regulations
Types, properties, tests, applications and treatment of fuels, lubricants, and solvents/chemicals used on board a steam vessel, including a basic understanding of the working principles, construction, maintenance and safe operation of centrifuges, filters, and other treatment devices
Units of measurement
Work health and safety (WHS)/occupational health and safety (OHS) legislation and policies
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.
Marine steam turbines may include:
Impulse
Reaction
Warming-through procedures may include:
Ensuring air vent is open
Minimising thermal shock
Warming up according to manufacturer instructions
Shutting down
Safety devices may include:
Axial movement
Gland temperature
Lube oil pressure
Lube oil temperature
Remote stops
Vacuum condenser pressure
Vibration
Auxiliary machinery may include:
Lube oil supply pump and system
Main boiler forced draught fan
Main condensate extraction pump and air ejector
Main condenser
Main cooling water circulating pump
Main fuel oil supply pump and system
Main feed pump
Steam distribution systems may include:
Auxiliary exhaust steam range
Auxiliary superheated steam range
Bled steam systems
Superheated main steam range
Fires may include:
Blow back
Economiser
Explosions
Low water level
Uptake
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
Ideal theoretical thermodynamic cycle for the operation of a steam plant is outlined
Why actual expansion of steam through a turbine differs from ideal cycle is explained
Typical heat losses around a steam plant are identified
Effect of air preheating, feed heating and economisation upon energy balance of steam plant’s thermodynamic cycle are explained
Typical heat (and/or mass) balance diagram for a ship’s steam plant is interpreted
Advantages of water tube boiler over fire tube boiler for shipboard applications are outlined
Construction and operation of a ‘D’ type membrane furnace boiler with superheater, economiser and air pre-heater is explained
External fittings required by Classification Society Rules on any large boiler are identified
Internal fittings of a boiler’s main steam drum are identified
How automation is applied to boiler control is clarified
Start up, operation and shut down of a main propulsion steam boiler is outlined
How common forms of blading and rotor construction are manufactured is clarified
How casings of common marine steam turbines are fitted out is clarified
Principles of thermodynamics are applied to explain expansion of steam in a typical marine turbine
Importance of start up and warming-through procedures for a steam turbine set is conveyed
Checks required during routine turbine operation are explained
Safety devices for a steam turbine set are identified and normal emergency shut-down procedures are identified
Operation of turbines under normal and emergency conditions is outlined
Construction and operation of different types of auxiliary machinery needed to support main propulsion steam turbines and boilers is outlined
Construction and operation of steam and electric motor prime movers required for driving auxiliary machinery are outlined
Configuration and operating principles of different steam distribution systems is outlined
Typical pressure reducing and pressure control valves suitable for steam service are outlined and illustrated
Difference between an open and a closed feed system is clarified
Closed feed system is outlined
Pressure feed heaters are outlined
Chemical injection equipment suitable for use on any ship’s main feed system is explained
Recommended limits of characteristics for boiler water and recommended intervals at which tests are undertaken are clarified
Reasons for treating boiler water are outlined
Different types of hardness in water, their consequences if left untreated, and ways of minimising their effect are explained
How corrosion within a boiler is minimised by treating boiler water is explained
Causes and ways of avoiding carry-over and caustic embrittlement are explained
Safety requirements for handling feedwater and boiler water treatment chemicals are explained
Why reduction gearing is required between steam turbines and propeller is clarified
Generation of tooth form is outlined
Double helical gearing and difference between single and double reduction gearing are explained
Applications of epicyclic gearing are explained
Function of flexible couplings in a turbine/gearing set is clarified
Components of a driveline from main wheel connection, aft, to propeller are listed
Methods and mechanisms for lubricating a driveline are detailed
Causes, symptoms and means of preventing and extinguishing fires associated with steam propulsion plant are detailed
Protective devices associated with boilers to minimise risk of fires, explosions and water shortages are identified
Routine inspection and maintenance requirements to prevent fires, explosions and water shortages are outlined
Forms
Assessment Cover Sheet
MARL5010A - Demonstrate basic knowledge of marine steam turbines and main boilers
Assessment task 1: [title]
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I declare that the assessment tasks submitted for this unit are my own work.
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Result: Competent Not yet competent
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Assessment Record Sheet
MARL5010A - Demonstrate basic knowledge of marine steam turbines and main boilers
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Assessment task 1: [title] Result: Competent Not yet competent
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Overall assessment result: Competent Not yet competent