Assessor Resource

MARL012
Apply basic principles of marine mechanics

Assessment tool

Version 1.0
Issue Date: April 2024


This unit involves the skills and knowledge required to apply the basic principles of marine mechanics and to perform associated calculations needed to operate and maintain marine machinery.

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).

No licensing, legislative or certification requirements apply to this unit at the time of publication.

You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)


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.

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Use vector diagrams to calculate the resultant and equilibrant of up to four coplanar forces

1.1

Meaning of force as a vector, moment of a force, resultant and equilibrant are explained

1.2

Forces using the triangle and polygon of forces are determined

1.3

Moments and couples applied to beams and levers are explained

1.4

Centroid of an area is calculated

1.5

Centre of gravity of regular geometrical shapes is calculated

1.6

Resultant and equilibrant of a system of concurrent coplanar-planer forces are calculated

2

Solve problems involving friction

2.1

Nature of friction and the laws of dry sliding friction are explained

2.2

Influence of lubrication on bearings and plain surfaces is outlined

2.3

Coefficient of friction is derived

2.4

Laws of friction are applied to movement in a horizontal plane and the force to overcome friction on horizontal surfaces

2.5

Effect of lubricating two surfaces in contact with each other is outlined

3

Apply laws of motion

3.1

Laws of motion are explained

3.2

Velocity/time and acceleration/displacement graphs are sketched and adapted to derive the standard velocity formula for both linear and angular motion

3.3

Formula and/or graphs are applied to solve problems of linear and angular velocity

3.4

Linear motion is converted to angular motion and revolutions to radians

4

Solve problems in dynamics related to marine machinery

4.1

Relationship between torque, work, energy and power in marine engines and compressors is explained

4.2

Conservation of energy theorem is used to calculate energy and power during linear and angular motion

4.3

Meaning of momentum is explained

4.4

Calculations are performed associated with the collision of rigid bodies

4.5

Centrifugal force is distinguished from centripetal force

4.6

Centrifugal and centripetal force in relation to marine machinery is calculated

5

Determine efficiency of lifting and geared marine machinery

5.1

Velocity ratio, mechanical advantage and efficiency of simple machines is calculated

5.2

Calculations are performed to solve problems related to the operation of simple machines

6

Calculate stress and strain due to axial loads

6.1

Normal stress is distinguished from strain

6.2

Hooke's Law for stress and strain is explained

6.3

Meaning of elastic limit, ultimate tensile strength, yield stress, limit of proportionality and factor of safety is explained

6.4

Normal stress and strain caused by axial loads is calculated

7

Determine shear stress and strain in coupling bolts and simple bolted connections

7.1

Shear stress in simple bolted connections is determined

7.2

Torque theory is applied to calculate shear stress in coupling bolts

8

Determine stresses in thin walled pressure vessels

8.1

Factor of safety and joint efficiency factor for pressure vessels is calculated

8.2

Hoop and longitudinal stress in thin walled pressure vessels is calculated

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

applying relevant work health and safety/occupational health and safety (WHS/OHS) requirements and work practices

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

identifying and applying relevant mathematical formulas and techniques to solve basic problems related to marine mechanics

identifying and interpreting numerical and graphical information, and performing mathematical calculations to determine resultant and equilibrant of coplanar forces, linear and angular velocity, and hoop and longitudinal stress in thin walled pressure vessels

identifying, collating and processing information required to perform basic calculations related to marine mechanics

reading and interpreting written information needed to perform basic calculations in marine mechanics

solving problems using appropriate laws and principles

performing accurate and reliable mathematical calculations using a calculator.

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

centre of gravity

conservation of energy theorem

effective verbal, written and visual communication strategies

factor of safety

force

joint efficiency factor

laws of motion

momentum

nature and laws of friction

pressure vessels

principles of marine mechanics

stress and strain

thin cylinder theory

types and uses of simple machines

WHS)/(OHS requirements and work practices.

Assessors must satisfy National Vocational Education and Training Regulator (NVR)/Australian Quality Training Framework (AQTF) assessor requirements.

Assessment must satisfy the National Vocational Education and Training Regulator (NVR)/Australian Quality Training Framework (AQTF) standards.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Assessment must occur in workplace operational situations or where these are not available, in simulated workplace operational situations or an industry-approved marine operations site that replicates workplace conditions where basic principles of marine mechanics can be applied.

Resources for assessment include access to:

diagrams, specifications and other information required for performing basic calculations related to marine mechanics

relevant regulatory and equipment documentation that impacts on work activities including workplace procedures, regulations, codes of practice and operation manuals

technical reference library with current publications on basic marine mechanics

tools, materials and equipment and personal protective equipment currently used in industry.

Performance should be demonstrated consistently over time and in a suitable range of contexts.

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.

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Use vector diagrams to calculate the resultant and equilibrant of up to four coplanar forces

1.1

Meaning of force as a vector, moment of a force, resultant and equilibrant are explained

1.2

Forces using the triangle and polygon of forces are determined

1.3

Moments and couples applied to beams and levers are explained

1.4

Centroid of an area is calculated

1.5

Centre of gravity of regular geometrical shapes is calculated

1.6

Resultant and equilibrant of a system of concurrent coplanar-planer forces are calculated

2

Solve problems involving friction

2.1

Nature of friction and the laws of dry sliding friction are explained

2.2

Influence of lubrication on bearings and plain surfaces is outlined

2.3

Coefficient of friction is derived

2.4

Laws of friction are applied to movement in a horizontal plane and the force to overcome friction on horizontal surfaces

2.5

Effect of lubricating two surfaces in contact with each other is outlined

3

Apply laws of motion

3.1

Laws of motion are explained

3.2

Velocity/time and acceleration/displacement graphs are sketched and adapted to derive the standard velocity formula for both linear and angular motion

3.3

Formula and/or graphs are applied to solve problems of linear and angular velocity

3.4

Linear motion is converted to angular motion and revolutions to radians

4

Solve problems in dynamics related to marine machinery

4.1

Relationship between torque, work, energy and power in marine engines and compressors is explained

4.2

Conservation of energy theorem is used to calculate energy and power during linear and angular motion

4.3

Meaning of momentum is explained

4.4

Calculations are performed associated with the collision of rigid bodies

4.5

Centrifugal force is distinguished from centripetal force

4.6

Centrifugal and centripetal force in relation to marine machinery is calculated

5

Determine efficiency of lifting and geared marine machinery

5.1

Velocity ratio, mechanical advantage and efficiency of simple machines is calculated

5.2

Calculations are performed to solve problems related to the operation of simple machines

6

Calculate stress and strain due to axial loads

6.1

Normal stress is distinguished from strain

6.2

Hooke's Law for stress and strain is explained

6.3

Meaning of elastic limit, ultimate tensile strength, yield stress, limit of proportionality and factor of safety is explained

6.4

Normal stress and strain caused by axial loads is calculated

7

Determine shear stress and strain in coupling bolts and simple bolted connections

7.1

Shear stress in simple bolted connections is determined

7.2

Torque theory is applied to calculate shear stress in coupling bolts

8

Determine stresses in thin walled pressure vessels

8.1

Factor of safety and joint efficiency factor for pressure vessels is calculated

8.2

Hoop and longitudinal stress in thin walled pressure vessels is calculated

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

Simple machines include one or more of the following:

hydraulic jack

pulley blocks

reduction gears

screw jack

single and double purchase crab winches

warwick screw

wheel and axle

worm driven chain blocks

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

applying relevant work health and safety/occupational health and safety (WHS/OHS) requirements and work practices

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

identifying and applying relevant mathematical formulas and techniques to solve basic problems related to marine mechanics

identifying and interpreting numerical and graphical information, and performing mathematical calculations to determine resultant and equilibrant of coplanar forces, linear and angular velocity, and hoop and longitudinal stress in thin walled pressure vessels

identifying, collating and processing information required to perform basic calculations related to marine mechanics

reading and interpreting written information needed to perform basic calculations in marine mechanics

solving problems using appropriate laws and principles

performing accurate and reliable mathematical calculations using a calculator.

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

centre of gravity

conservation of energy theorem

effective verbal, written and visual communication strategies

factor of safety

force

joint efficiency factor

laws of motion

momentum

nature and laws of friction

pressure vessels

principles of marine mechanics

stress and strain

thin cylinder theory

types and uses of simple machines

WHS)/(OHS requirements and work practices.

Assessors must satisfy National Vocational Education and Training Regulator (NVR)/Australian Quality Training Framework (AQTF) assessor requirements.

Assessment must satisfy the National Vocational Education and Training Regulator (NVR)/Australian Quality Training Framework (AQTF) standards.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Assessment must occur in workplace operational situations or where these are not available, in simulated workplace operational situations or an industry-approved marine operations site that replicates workplace conditions where basic principles of marine mechanics can be applied.

Resources for assessment include access to:

diagrams, specifications and other information required for performing basic calculations related to marine mechanics

relevant regulatory and equipment documentation that impacts on work activities including workplace procedures, regulations, codes of practice and operation manuals

technical reference library with current publications on basic marine mechanics

tools, materials and equipment and personal protective equipment currently used in industry.

Performance should be demonstrated consistently over time and in a suitable range of contexts.
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
Meaning of force as a vector, moment of a force, resultant and equilibrant are explained 
Forces using the triangle and polygon of forces are determined 
Moments and couples applied to beams and levers are explained 
Centroid of an area is calculated 
Centre of gravity of regular geometrical shapes is calculated 
Resultant and equilibrant of a system of concurrent coplanar-planer forces are calculated 
Nature of friction and the laws of dry sliding friction are explained 
Influence of lubrication on bearings and plain surfaces is outlined 
Coefficient of friction is derived 
Laws of friction are applied to movement in a horizontal plane and the force to overcome friction on horizontal surfaces 
Effect of lubricating two surfaces in contact with each other is outlined 
Laws of motion are explained 
Velocity/time and acceleration/displacement graphs are sketched and adapted to derive the standard velocity formula for both linear and angular motion 
Formula and/or graphs are applied to solve problems of linear and angular velocity 
Linear motion is converted to angular motion and revolutions to radians 
Relationship between torque, work, energy and power in marine engines and compressors is explained 
Conservation of energy theorem is used to calculate energy and power during linear and angular motion 
Meaning of momentum is explained 
Calculations are performed associated with the collision of rigid bodies 
Centrifugal force is distinguished from centripetal force 
Centrifugal and centripetal force in relation to marine machinery is calculated 
Velocity ratio, mechanical advantage and efficiency of simple machines is calculated 
Calculations are performed to solve problems related to the operation of simple machines 
Normal stress is distinguished from strain 
Hooke's Law for stress and strain is explained 
Meaning of elastic limit, ultimate tensile strength, yield stress, limit of proportionality and factor of safety is explained 
Normal stress and strain caused by axial loads is calculated 
Shear stress in simple bolted connections is determined 
Torque theory is applied to calculate shear stress in coupling bolts 
Factor of safety and joint efficiency factor for pressure vessels is calculated 
Hoop and longitudinal stress in thin walled pressure vessels is calculated 

Forms

Assessment Cover Sheet

MARL012 - Apply basic principles of marine mechanics
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Assessment Record Sheet

MARL012 - Apply basic principles of marine mechanics

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

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Overall assessment result: Competent Not yet competent

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