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Evidence Guide: MARL010 - Apply basic principles of marine electrotechnology

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

 

MARL010 - Apply basic principles of marine electrotechnology

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

Explain how material properties affect resistance of electrical conductors

  1. Terms and symbols used in the formula for resistivity are used correctly
  2. How resistance varies with changes in conductor length and cross sectional area is outlined
  3. How resistance varies with temperature is outlined
  4. Calculations are performed that illustrate how material properties affect resistance of electrical conductors
Terms and symbols used in the formula for resistivity are used correctly

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

How resistance varies with changes in conductor length and cross sectional area is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

How resistance varies with temperature is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculations are performed that illustrate how material properties affect resistance of electrical conductors

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply Ohm’s Law to electrical circuits

  1. Main sources of EMF are identified
  2. Terms and symbols used in Ohm’s Law are used correctly
  3. Calculations are performed using Ohm’s Law to solve problems involving internal, external and variable resistances in both series and parallel circuits
  4. Calculations are performed to determine power required and /or energy expended by electrical devices
  5. Circuits for a wheatstone bridge and a slide wire bridge are sketched and their application on a ship is outlined
  6. Calculations are performed dealing with resistances, currents and voltage drops in bridge circuits under null or balanced conditions
Main sources of EMF are identified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Terms and symbols used in Ohm’s Law are used correctly

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculations are performed using Ohm’s Law to solve problems involving internal, external and variable resistances in both series and parallel circuits

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculations are performed to determine power required and /or energy expended by electrical devices

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Circuits for a wheatstone bridge and a slide wire bridge are sketched and their application on a ship is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculations are performed dealing with resistances, currents and voltage drops in bridge circuits under null or balanced conditions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply principles of electrolytic action to electrical cells

  1. How the theory of electrolytic disassociation when applied to common electrolytic solutions and electrode materials explains the generation of EMF from chemical sources, is outlined
  2. Primary cells are distinguished from secondary cells
  3. Calculations are performed to solve problems involving currents, voltage drops and terminal potential difference of cells connected to form batteries in series and in parallel
  4. How capacity of a battery is measured is explained
  5. Construction of typical batteries used in marine environments is outlined
How the theory of electrolytic disassociation when applied to common electrolytic solutions and electrode materials explains the generation of EMF from chemical sources, is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Primary cells are distinguished from secondary cells

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculations are performed to solve problems involving currents, voltage drops and terminal potential difference of cells connected to form batteries in series and in parallel

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

How capacity of a battery is measured is explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Construction of typical batteries used in marine environments is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply principles of electromagnetism to EMF generation

  1. Form and properties of the magnetic fields surrounding single conductor and multi-turn solenoid coils when carrying an electrical current are compared and contrasted
  2. Terms and symbols used in Faraday’s and Lenz’s laws of electromagnetic induction are used correctly
  3. Calculations are performed using Faraday’s and Lenz’s laws of electromagnetic induction to solve problems related to electromagnetism and EMF generation
  4. Fleming’s Right Hand Rule is outlined
Form and properties of the magnetic fields surrounding single conductor and multi-turn solenoid coils when carrying an electrical current are compared and contrasted

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Terms and symbols used in Faraday’s and Lenz’s laws of electromagnetic induction are used correctly

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculations are performed using Faraday’s and Lenz’s laws of electromagnetic induction to solve problems related to electromagnetism and EMF generation

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Fleming’s Right Hand Rule is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Explain operation of direct current rotating machinery

  1. Construction and methods of maintaining and repairing typical direct current (DC) machines are illustrated
  2. Principle wiring arrangements used with DC machines are outlined
  3. Action of the commutator in DC generators is outlined
  4. Significance of Back EMF (Eb) in the operation of DC motors is outlined
  5. Mathematical formula are applied to show relationships between operational parameters of DC motors
  6. Calculations are performed to solve simple problems relating to power output and efficiency in DC motors
Construction and methods of maintaining and repairing typical direct current (DC) machines are illustrated

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Principle wiring arrangements used with DC machines are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Action of the commutator in DC generators is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Significance of Back EMF (Eb) in the operation of DC motors is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Mathematical formula are applied to show relationships between operational parameters of DC motors

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculations are performed to solve simple problems relating to power output and efficiency in DC motors

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Explain operation of AC rotating machinery

  1. How three-phase AC may be developed out of simple single phase AC is explained
  2. Difference between Star and Delta connections is outlined
  3. How a three-phase supply can generate a rotating magnetic field is explained
  4. Construction of an AC synchronous generator is outlined
  5. Construction of an AC induction motor is outlined
  6. Calculations are performed to show how driving torque is produced in an induction motor
How three-phase AC may be developed out of simple single phase AC is explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Difference between Star and Delta connections is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

How a three-phase supply can generate a rotating magnetic field is explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Construction of an AC synchronous generator is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Construction of an AC induction motor is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculations are performed to show how driving torque is produced in an induction motor

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Explain parallel operation and load sharing of generator

  1. Load/voltage curves of AC and DC generators are compared
  2. Main requirements for satisfactory power sharing between both AC and DC generators are outlined
  3. Sequences that occur when load changes on two DC generators working in parallel without an equaliser connection are outlined
  4. Effect of varying power factors on the load/voltage curve of an AC generator is outlined
Load/voltage curves of AC and DC generators are compared

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Main requirements for satisfactory power sharing between both AC and DC generators are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Sequences that occur when load changes on two DC generators working in parallel without an equaliser connection are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Effect of varying power factors on the load/voltage curve of an AC generator is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply Ohm’s Law to electrical circuits

  1. Main sources of EMF are identified
  2. Terms and symbols used in Ohm’s Law are used correctly
  3. Calculations are performed using Ohm’s Law to solve problems involving internal, external and variable resistances in both series and parallel circuits
  4. Calculations are performed to determine power required and /or energy expended by electrical devices
  5. Circuits for a wheatstone bridge and a slide wire bridge are sketched and their application on a ship is outlined
  6. Calculations are performed dealing with resistances, currents and voltage drops in bridge circuits under null or balanced conditions
Main sources of EMF are identified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Terms and symbols used in Ohm’s Law are used correctly

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculations are performed using Ohm’s Law to solve problems involving internal, external and variable resistances in both series and parallel circuits

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculations are performed to determine power required and /or energy expended by electrical devices

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Circuits for a wheatstone bridge and a slide wire bridge are sketched and their application on a ship is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculations are performed dealing with resistances, currents and voltage drops in bridge circuits under null or balanced conditions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Elements describe the essential outcomes.

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

1

Explain how material properties affect resistance of electrical conductors

1.1

Terms and symbols used in the formula for resistivity are used correctly

1.2

How resistance varies with changes in conductor length and cross sectional area is outlined

1.3

How resistance varies with temperature is outlined

1.4

Calculations are performed that illustrate how material properties affect resistance of electrical conductors

2

Apply Ohm’s Law to electrical circuits

2.1

Main sources of EMF are identified

2.2

Terms and symbols used in Ohm’s Law are used correctly

2.3

Calculations are performed using Ohm’s Law to solve problems involving internal, external and variable resistances in both series and parallel circuits

2.4

Calculations are performed to determine power required and /or energy expended by electrical devices

2.5

Circuits for a wheatstone bridge and a slide wire bridge are sketched and their application on a ship is outlined

2.6

Calculations are performed dealing with resistances, currents and voltage drops in bridge circuits under null or balanced conditions

3

Apply principles of electrolytic action to electrical cells

3.1

How the theory of electrolytic disassociation when applied to common electrolytic solutions and electrode materials explains the generation of EMF from chemical sources, is outlined

3.2

Primary cells are distinguished from secondary cells

3.3

Calculations are performed to solve problems involving currents, voltage drops and terminal potential difference of cells connected to form batteries in series and in parallel

3.4

How capacity of a battery is measured is explained

3.5

Construction of typical batteries used in marine environments is outlined

4

Apply principles of electromagnetism to EMF generation

4.1

Form and properties of the magnetic fields surrounding single conductor and multi-turn solenoid coils when carrying an electrical current are compared and contrasted

4.2

Terms and symbols used in Faraday’s and Lenz’s laws of electromagnetic induction are used correctly

4.3

Calculations are performed using Faraday’s and Lenz’s laws of electromagnetic induction to solve problems related to electromagnetism and EMF generation

4.4

Fleming’s Right Hand Rule is outlined

5

Explain operation of direct current rotating machinery

5.1

Construction and methods of maintaining and repairing typical direct current (DC) machines are illustrated

5.2

Principle wiring arrangements used with DC machines are outlined

5.3

Action of the commutator in DC generators is outlined

5.4

Significance of Back EMF (Eb) in the operation of DC motors is outlined

5.5

Mathematical formula are applied to show relationships between operational parameters of DC motors

5.6

Calculations are performed to solve simple problems relating to power output and efficiency in DC motors

6

Explain operation of AC rotating machinery

6.1

How three-phase AC may be developed out of simple single phase AC is explained

6.2

Difference between Star and Delta connections is outlined

6.3

How a three-phase supply can generate a rotating magnetic field is explained

6.4

Construction of an AC synchronous generator is outlined

6.5

Construction of an AC induction motor is outlined

6.6

Calculations are performed to show how driving torque is produced in an induction motor

7

Explain parallel operation and load sharing of generator

7.1

Load/voltage curves of AC and DC generators are compared

7.2

Main requirements for satisfactory power sharing between both AC and DC generators are outlined

7.3

Sequences that occur when load changes on two DC generators working in parallel without an equaliser connection are outlined

7.4

Effect of varying power factors on the load/voltage curve of an AC generator is outlined

Required Skills and Knowledge

Elements describe the essential outcomes.

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

1

Explain how material properties affect resistance of electrical conductors

1.1

Terms and symbols used in the formula for resistivity are used correctly

1.2

How resistance varies with changes in conductor length and cross sectional area is outlined

1.3

How resistance varies with temperature is outlined

1.4

Calculations are performed that illustrate how material properties affect resistance of electrical conductors

2

Apply Ohm’s Law to electrical circuits

2.1

Main sources of EMF are identified

2.2

Terms and symbols used in Ohm’s Law are used correctly

2.3

Calculations are performed using Ohm’s Law to solve problems involving internal, external and variable resistances in both series and parallel circuits

2.4

Calculations are performed to determine power required and /or energy expended by electrical devices

2.5

Circuits for a wheatstone bridge and a slide wire bridge are sketched and their application on a ship is outlined

2.6

Calculations are performed dealing with resistances, currents and voltage drops in bridge circuits under null or balanced conditions

3

Apply principles of electrolytic action to electrical cells

3.1

How the theory of electrolytic disassociation when applied to common electrolytic solutions and electrode materials explains the generation of EMF from chemical sources, is outlined

3.2

Primary cells are distinguished from secondary cells

3.3

Calculations are performed to solve problems involving currents, voltage drops and terminal potential difference of cells connected to form batteries in series and in parallel

3.4

How capacity of a battery is measured is explained

3.5

Construction of typical batteries used in marine environments is outlined

4

Apply principles of electromagnetism to EMF generation

4.1

Form and properties of the magnetic fields surrounding single conductor and multi-turn solenoid coils when carrying an electrical current are compared and contrasted

4.2

Terms and symbols used in Faraday’s and Lenz’s laws of electromagnetic induction are used correctly

4.3

Calculations are performed using Faraday’s and Lenz’s laws of electromagnetic induction to solve problems related to electromagnetism and EMF generation

4.4

Fleming’s Right Hand Rule is outlined

5

Explain operation of direct current rotating machinery

5.1

Construction and methods of maintaining and repairing typical direct current (DC) machines are illustrated

5.2

Principle wiring arrangements used with DC machines are outlined

5.3

Action of the commutator in DC generators is outlined

5.4

Significance of Back EMF (Eb) in the operation of DC motors is outlined

5.5

Mathematical formula are applied to show relationships between operational parameters of DC motors

5.6

Calculations are performed to solve simple problems relating to power output and efficiency in DC motors

6

Explain operation of AC rotating machinery

6.1

How three-phase AC may be developed out of simple single phase AC is explained

6.2

Difference between Star and Delta connections is outlined

6.3

How a three-phase supply can generate a rotating magnetic field is explained

6.4

Construction of an AC synchronous generator is outlined

6.5

Construction of an AC induction motor is outlined

6.6

Calculations are performed to show how driving torque is produced in an induction motor

7

Explain parallel operation and load sharing of generator

7.1

Load/voltage curves of AC and DC generators are compared

7.2

Main requirements for satisfactory power sharing between both AC and DC generators are outlined

7.3

Sequences that occur when load changes on two DC generators working in parallel without an equaliser connection are outlined

7.4

Effect of varying power factors on the load/voltage curve of an AC generator is outlined

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 electrotechnology

identifying and interpreting numerical and graphical information, and performing mathematical calculations such as resistance of electrical conductors, power output and efficiency in DC motors, and driving torque in induction motors

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

performing accurate and reliable calculations

reading and interpreting written information needed to perform basic electrical calculations

solving problems using appropriate laws and principles.

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:

AC:

rotating machinery

principles

basic electrical circuits

basic principles of marine electrotechnology

batteries

DC:

rotating machinery

motors

difference between AC and DC

electrical:

current

power

safety

units of measurement

electromagnetic:

induction

force

effective verbal, written and visual communication techniques

Ohm’s Law

parallel circuits

principles of electromagnetism and electrolytic action

resistance

series circuits

WHS/OHS requirements and work practices.

Range Statement

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

Operational parameters of DC motors must include:

current

flux density

torque

voltage