Apply intermediate principles of marine mechanics

Unit of competency Outline

Date retreived
22/07/2026 3:09 PM AWST

Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.

Unit of competency

National Code
MARL016

State Code
AUG79

TGA Status
Replaced

DTWD Status
Replaced

Current Release Number
1.00

Current Release Date
27/02/2015

View on TGA

State Implementation and Classification

Approved Date

28/08/2015

Field of Education

031701 - Maritime Engineering

Original Release Date

28/08/2015

Nominal Hours

Description

This unit involves the skills and knowledge required to apply intermediate principles of marine mechanics and to perform associated calculations needed to operate and maintain marine machinery.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).No licensing, legislative or certification requirements apply to this unit at the time of publication.

Notes

Elements and Performance Criteria

1 Apply principle of moments to determine forces in supports, connections, bearings and support systems

1.1 Equilibrium of solids is explained
1.2 Polygon of forces is applied to determine an unknown force
1.3 Principle of moments is applied to solve moments of any quantity
1.4 Resultant of a system of co-planer forces is calculated
1.5 Twisting moment due to engine crank mechanisms is calculated
1.6 Moments of areas and solids are calculated

2 Perform friction calculations

2.1 Laws of friction are applied to solve problems involving friction in inclined planes
2.2 Coefficient of friction is converted to angle of repose
2.3 Friction theory is applied to solve problems involving screw threads
2.4 Brake torque is analysed and problems are solved relating to work lost on brake shoes and brake discs

3 Solve motion problems

3.1 Linear velocity/time and acceleration/time graphs are applied to derive standard linear formula
3.2 Problems of linear and angular motion involving uniform acceleration and deceleration are solved
3.3 Marine engineering problems involving free falling bodies are solved

4 Solve problems using principle of momentum

4.1 Relationship between momentum and impulse is explained
4.2 Conservation of energy theory is applied to problems involving collision of perfectly elastic bodies

5 Solve problems using principles of dynamics

5.1 Centripetal force is distinguished from centrifugal force
5.2 Relationship between centripetal and centrifugal force and mass, angular velocity and radius is clarified
5.3 Problems are solved involving centripetal and centrifugal forces
5.4 Centripetal acceleration is distinguished from centrifugal force
5.5 Out-of-balance forces on co-planer systems are calculated
5.6 Bearing reactions in rotating shafts are determined
5.7 Radius of gyration and moment of inertion when applied to rotating bodies is explained
5.8 Centrifugal forces in governors are calculated
5.9 Principles of dynamics are applied to solve problems involving rotating bodies, accelerating shafts, motors and flywheels

6 Calculate stresses and strains on components due to axial loading and restricted thermal expansion

6.1 Reduction in area and percentage elongation of tensile test specimens is calculated
6.2 Stresses in composite bodies of dissimilar dimensions and dissimilar materials are calculated
6.3 Problems involving thermal stress on components due to temperature change with free and restricted expansion are solved

7 Apply thin cylinder theory to determine stresses in pressure vessels

7.1 Stress on thin-shelled pressure vessels due to internal pressure is calculated
7.2 Formula for calculating stress on thin-shelled pressure vessels to incorporate special conditions is modified

8 Apply torsion theory to calculate shear stress

8.1 Torsion equation is applied to solve problems involving solid and hollow shafts
8.2 Power transmitted in shafts and coupling bolts is calculated
8.3 Torsion equation is applied to calculate stress and deflection in a close-coiled helical spring
8.4 Power transmitted by shafts and couplings is calculated

9 Solve problems involving fluids

9.1 Variation of fluid pressure with depth is calculated
9.2 Bernoulli’s Theorem is used to solve problems of velocity, pressure and head in pipes and ducted systems
9.3 Archimedes’ Principle is used to solve problems related to floating vessels using real and apparent weight

10 Apply beam theory to solve problems

10.1 Reactions of a loaded beam are calculated
10.2 Shear force and bending moment diagrams are constructed for simply supported and cantilever beams
10.3 Shear force and bending moment diagrams for beams with concentrated and uniformly distributed loads are calculated
10.4 Beam equation is applied to derive stresses in beams loaded with concentrated and uniformly distributed loads
10.5 Beam equation is applied to calculate bending stresses

No information

Replaces

State Code	National Code	Title	Type
WG473	MARL6003A	Apply intermediate principles of marine mechanics	Unit of competency

Replaced By

State Code	National Code	Title	Type
OCH25	MARL040	Apply advanced principles of marine mechanics	Unit of competency

State Code	National Code	Title	Type
AVQ3	MAR60115	Advanced Diploma of Maritime Operations (Marine Engineering Class 2)	Qualification