Assessor Resource

MARL6016A
Demonstrate intermediate knowledge of marine steam turbines and main boilers

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 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 intermediate knowledge of marine steam turbines and main boilers can be demonstrated

diagrams, specifications and other information 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.

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 demonstrating intermediate 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

Identify and apply relevant solutions to problems that can occur during operation of steam propulsion plant and associated systems on a steam vessel

Identify and interpret diagnostic information, and perform mathematical calculations related to operating, maintaining and repairing 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 of defects of auxiliary steam turbines

construction and operation of main and auxiliary steam turbines

procedures for emergency operation of a steam turbine

Construction and operation of feed system

Construction and operation of high-pressure turbines

Construction, operation and repair of high-pressure water tube boilers

Energy balance for a steam turbine plant

Established engineering practice and procedures for operation of 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 during operation of steam propulsion plant and associated systems, and appropriate preventative and remedial action

Methods of lubricating 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 and interpreting readings and indications of performance of steam propulsion plant and associated systems

Requirements for feed water treatment for high-pressure water tube boilers

Simple cycle marine gas turbine

Turbine gearing arrangements

Types, properties, tests, applications and treatment of fuels, lubricants and solvents/chemicals used on board a steam vessel, including working principles, construction, maintenance and safe operation of centrifuges, filters, and other treatment devices

Typical operating precautions for steam propulsion plant and associated systems to ensure operational performance is complies with bridge orders, technical specifications, survey requirements, and established safety and anti-pollution rules and regulations

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.

Accessories may include:

Accessory gear

Lube oil:

coolers

pumps

filters

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
Heat losses in a turbine and turbine system are analysed 
How steam properties change through a turbine are shown on an enthalpy/entropy diagram 
How air heaters and economisers affect turbine plant efficiency is explained 
Practical methods of verifying energy losses are detailed 
Operation and components of the complete feed system are outlined 
Construction, operating principles and maintenance requirements of a regenerative condenser are explained 
Causes of loss of vacuum are identified 
Construction and operation of air ejectors, vacuums and extraction pumps are explained 
Construction and operation of gland condensers, low-pressure heaters, drain coolers and high-pressure heaters are explained 
General arrangement and construction of turbo-feed pumps is outlined 
Governor control is explained 
Operating principles and construction details of de-aerators are explained 
Operating principles of high-pressure boilers, including water and gas flow circulation are explained 
Drum, internal fittings and support and expansion arrangements are outlined 
Procedures for repairing a membrane wall furnace are clarified 
Operating principles and construction methods of integral and external superheaters are explained 
Construction and operation of economisers and air heaters is explained 
Chemistry of combustion is explained 
Typical burner register arrangements are outlined 
Construction, operation and maintenance of boiler gauge glasses and safety valves is explained 
Operation of boiler control and soot blowing system is detailed 
Blow-down procedure for a high pressure boiler is prepared 
How salts are precipitated and how metal is corroded in the boiler and feed system is explained and method of prevention is outlined 
How oxygen is eliminated in high-pressure boilers is shown 
How pH is measured and controlled is explained 
Normal and maximum operating limits for boiler feed water treatment are identified and procedure to follow if these limits are exceeded is clarified 
Purpose and procedure for different types of tests of boiler water chemistry are explained 
Flow of steam through nozzles is analysed, and pressure and velocity compounding are illustrated 
Construction of blades, bearings, glands, rotors and casings is explained 
Warming-through procedure prior to start up is explained 
Routine checks during operation are detailed 
Emergency operation of plant with one turbine inoperative is outlined 
Turbine shutdown procedure is clarified 
Routine checks carried out at a turbine plant survey are detailed 
Precautions necessary when turbine and gearing casings are open are explained and any repairs or adjustments that may be required are identified 
Performance of steam plant by routine observations of pressure temperature speed and vibration of turbine, gearing and associated systems is analysed 
Single and double reduction gearing systems are outlined 
Use of double helical involute gear teeth is explained 
Advantages and disadvantages of single and double locked tandem gearboxes are detailed 
Purpose of fitting a nodal drive in gearing system is clarified 
Construction and reason for installing flexible couplings in gearing system is explained 
Layout of a turbo-electric drive is detailed 
Construction of compressor, combustion system and single and two shaft turbines is explained 
Necessary controls required for control and protection of plant are confirmed 
Accessories necessary for safe operation of simple cycle marine gas turbines are listed 

Forms

Assessment Cover Sheet

MARL6016A - Demonstrate intermediate knowledge of marine steam turbines and main boilers
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

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Assessment Record Sheet

MARL6016A - Demonstrate intermediate knowledge of marine steam turbines and main boilers

Student name:

Student ID:

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

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

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Date:

Student signature:

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