LA020088, Assignment 2, UEENEEE137A Ed1 1
© New South Wales Technical and Further Education Commission, 2015 (TAFE NSW – WSI), Version 1, September 2015
UEENEEE137A, Assignment 2
What you have to do
This assignment covers the material in topics 2, 3, 4, 5 and 6 from the knowledge
specification KS01-EE137A of unit UEENEEE137A.
Answer in the space provided where possible but use separate paper if required. The
complete assignment will be returned to you so answering on the assignment allows more
easily understood feedback.
Brackets have been provided with multiple choice questions for you to insert the letter
corresponding to your answer.
For short answer questions keep your answers clear and concise and ensure you answer the
question as asked.
For diagrams also keep your answer clear and concise.
Your textbook will generally be the prime sources of information but don’t forget to access
the internet, OTEN readings and presentations.
This assignment is part of the assessment underpinning your workplace performance criteria;
therefore, you need to demonstrate that you have studied and comprehended these topics.
This will be shown by achieving 70% from your marker. If you do not achieve this then you
will be required to resubmit this assignment.
Total marks for this assignment is 67
2 LA020088, Assignment 2, UEENEEE137A Ed1
© New South Wales Technical and Further Education Commission, 2015 (TAFE NSW – WSI), Version 1, September 2015
Topic 2: Hazards, risks and control measures—construction
Short answer questions (1 mark per written part or as shown)
1 What type of control measure would a dust collection fan be (e.g. Elimination)?
________________________________________________________________
2 State the main reason why some older switchboard materials should not be cut or drilled
without precautions.
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3 Name a toxic gas which may build up in an enclosed tank.
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4 Name one type of work activity involving a certain wood type which is a dangerous
wood dust hazard.
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5 Where may an electrician be exposed to legionella bacterium?
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6 Describe a serious hazard when cutting and joining fibre optics.
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7 Name 2 locations in some cottage type premises where asbestos can be found. (2 marks)
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8 Name 2 essential types of PPE which should be issued to workers for their protection
when working in a bright sunny location at a building site. (2 marks)
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9 A sign displayed on a construction site which shows a person’s head with ear protection
means that it is mandatory/not mandatory to wear the protection (Circle the correct
answer)
10 75dB of continuous noise in a workplace is the threshold of where permanent damage
can occur.
True or False (Circle the correct answer)
LA020088, Assignment 2, UEENEEE137A Ed1 3
© New South Wales Technical and Further Education Commission, 2015 (TAFE NSW – WSI), Version 1, September 2015
11 The low reach insulated elevated work platform would be an ideal item of plant
equipment to use on live wires at the point of connection to a commercial building The
elevated work platform in NSW requires a high risk license from Workcover NSW to use
it.
True or False (Circle the correct answer)
12 Name one location that would be classed as a confined space by Workcover NSW.
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________________________________________________________________
13 What do the letters MSDS stand for?
________________________________________________________________
Total marks /15
4 LA020088, Assignment 2, UEENEEE137A Ed1
© New South Wales Technical and Further Education Commission, 2015 (TAFE NSW – WSI), Version 1, September 2015
Topics 3 and 5: Extra Low Voltage and Low Voltage Hazards and
Risks
Short answer questions (1 mark per written part or as shown)
Extra low voltage is defined as not more than 50Vac or 120Vdc. Low voltage is defined as
being between 50Vac and 1000Vac or between 120Vdc and 1500Vdc.
Be very careful of these names which could be misleading to a person who has not had
training in the Electrotechnology field. Low voltage is lethal. Extra low voltage could also be
lethal in the right environment such as high humidity, dampness, salt water, body salts from
perspiration etc. This is a very important area for safety risk management, and you must do
all the reading and show a high understanding of the dangers and hazards when working with
electrical circuits.
Read the following code of practice as your life and that of others around you is not
worth taking risks with electricity. Just copy and paste in GOOGLE.
http://wwwworkcovernswgovau/formspublications/publications/
Documents/low_voltage_electrical_work_code_of_practice_0964pdf
Watch the following video from YouTube
http://wwwyoutubecom/watch?v=HaSeu7-YG1M: the girl with hairdryer and
electrical worker…’Electrical Accident ‘It’s All About The Hair’
This video is about Low Voltage electrical hazard and lockout/tag out procedures.
Note that the consequences in Australia would be more severe due to the voltage and
frequency of our supply compared to the USA.
For questions 14 and 15 you must read the document from Safe Work Australia, ’Managing
Electrical Risks in the Workplace’ and use the information you learn from that document to
best answer them.
http://wwwsafeworkaustraliagovau/sites/SWA/about/Publications/
Documents/699/Managing%20Electrical%20Risks%20in%20the%20
Workplacepdf
14 From Section 51 of the above document, state the safe work procedure which
must be done when working on all electrical equipment or installations. Also,
state whether the electrical contractor in the video appeared to perform this
procedure. (3 marks)
________________________________________________________________
________________________________________________________________
________________________________________________________________
LA020088, Assignment 2, UEENEEE137A Ed1 5
© New South Wales Technical and Further Education Commission, 2015 (TAFE NSW – WSI), Version 1, September 2015
15 From Section 6 of the Safe Work Australia document, discuss what the electrical
contractor in the video did not do, and show clearly 4 steps he should have taken
to comply with the Section 6 requirements. (5 marks)
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________________________________________________________________
________________________________________________________________
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16 Place numbers from 1 to 7 in the blanks indicating the correct order of steps to be
taken in lockout/tag out. (7 marks)
Order of
action
Steps to be taken
Isolate equipment
Verify isolation
Control stored energy
Shut down equipment
Prepare for shutdown
Apply lockout/tag out devices
17 You know the equipment is safe when the power has been turned off.
True or False (circle correct answer)
18 Which of the following would be part of “control of stored energy”? Circle the
identifying letter. (4 marks)
(a) closing valves,
(b) locking out feeders,
(c) turning off power,
(d) releasing hydraulic pressure,
(e) releasing steam pressure,
(f) blocking movement of parts,
(g) releasing spring tension
6 LA020088, Assignment 2, UEENEEE137A Ed1
© New South Wales Technical and Further Education Commission, 2015 (TAFE NSW – WSI), Version 1, September 2015
19 Locks should be removed only by the person who installed them.
True or False (circle correct answer)
20 Name 2 items used to indicate that electrical work is being carried out. (2 marks)
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Questions 21 to 24 refer to the computer power supply shown below.
ATX power supply interior Legend
A—bridge rectifier
B—input filter capacitors
between B and C—Heatsink of high-voltage
transistors
C—transformer
between C and D—Heatsink of low-voltage,
high-current rectifiers
D—output filter coil
E—output filter capacitors
21 Charged capacitors in the power supply are only 12 Volts and do not represent a hazard.
True or False (circle correct)
22 If the 5 Volt output on the power supply is going into a low resistance load there is no
possibility of a fire hazard.
True or False (circle correct)
23 If you are required to service extra low voltage 5 Volt systems like this, there is no
hazard from wearing metal jewelry.
True or False (circle correct)
Nameplate for computer power supply
LA020088, Assignment 2, UEENEEE137A Ed1 7
© New South Wales Technical and Further Education Commission, 2015 (TAFE NSW – WSI), Version 1, September 2015
24 The power supply is an extra low class of supply, having voltages as shown from
3.3 Volts up to 12 Volts This supply is quite safe for consumers to open and do
modifications with and represents no 230 Volt electrocution risk.
True or False (circle correct)
25 As a first year apprentice it is quite ok for your supervisor to leave you unsupervised to
install a new socket-outlet in an installation as you have done it by yourself on other
occasions.
True or False (circle correct)
Total marks /28
8 LA020088, Assignment 2, UEENEEE137A Ed1
© New South Wales Technical and Further Education Commission, 2015 (TAFE NSW – WSI), Version 1, September 2015
Topic 4: Hazards, risks and control measures associated with high
voltage
Multiple choice questions, 1 mark each
26 The dielectric strength of mica can be expected to be more than:
(a) 500 kV/mm
(b) 1500 kV/mm
(c) 2500 kV/mm
(d) 3500 kV/mm ( )
27 All of the following dielectric materials are preferred for high frequency applications
except:
(a) Polyethylene
(b) Butyl rubber
(c) Teflon
(d) Polystyrene ( )
28 The phenomenon of corona is generally accompanied by:
(a) a bang
(b) a hissing sound
(c) magnetic hum
(d) all of the above ( )
29 Surge voltage originates in power systems due to:
(a) lightning
(b) switching operations
(c) faults
(d) any of the above. ( )
30 Surge diverters are:
(a) nonlinear resistors in series with spark gaps to act as fast switches
(b) arc quenching devices
(c) shunt reactors to limit voltage due to the Ferranti effect
(d) over voltages of power frequency harmonics. ( )
LA020088, Assignment 2, UEENEEE137A Ed1 9
© New South Wales Technical and Further Education Commission, 2015 (TAFE NSW – WSI), Version 1, September 2015
31 Step potential means:
(a) A step-up transformer is used to increase potential to a circuit in high
demand situations
(b) An earth fault situation has occurred and if the soil is high resistance a
workers legs will conduct current better than the soil in the distance of 1 step
(c) Voltages to domestic dwellings are stepped up as the cables run down a street to
overcome losses
(d) Rings of voltage radiating through damp soil can give rise to large
currents and voltages which would not be lethal when stepped upon. ( )
32 An authorised and properly trained person can be within __________ of energised 33kV:
(a) 2000mm
(b) 3000mm
(c) 700mm
(d) none of the above as the line would need to be de-energised. ( )
33 Induced voltage is:
(a) Voltage produced by the secondary of a high voltage transformer
(b) Due to the significant electromagnetic fields present around energized
HV electric lines, voltages may be induced onto adjacent de- energised or
non-commissioned electric lines
(c) Electrified fences work on the principle of electromagnetic induction and because
of the field of energy around the conducting wires, animals stay away
(d) Voltage which is sufficient to overcome rated creepage distances and then
cause surges in domestic installation. ( )
34 To eliminate electrical tracking between two close conductors, designers must provide
adequate CR______E distance between electrical elements.
Total marks /9
10 LA020088, Assignment 2, UEENEEE137A Ed1
© New South Wales Technical and Further Education Commission, 2015 (TAFE NSW – WSI), Version 1, September 2015
Topic 6 Hazards and Risks with harmful materials
Short answer questions (1 mark per written part or as shown)
35 Name the illness which is caused by Manganese in Welding Fumes.
________________________________________________________________
36 Welding with stainless steel can be hazardous due to: (2 marks)
________________________________________________________________
________________________________________________________________
37 Heating or cutting metal or other material which has been coated with lead will
produce a hazard. Describe the hazard and state what part of the body is affected
by this. (2 marks)
________________________________________________________________
________________________________________________________________
38 You have been told to blow the dust out of some electrical equipment Name the single
most dangerous airborne contaminant from this process.
________________________________________________________________
39 Name an example of an administrative control measure with respect to operating a laser.
Think especially about a worksite and how to warn other people.
________________________________________________________________
40 Name what effect the dust from drilling into bricks or cement will have on the human
body.
________________________________________________________________
41 What is the main hazard that exists when trimming optic fibre with a sharp knife or
scalpel blade?
(the answer is not cutting your finger)
_________________________________________________________________
42 Fluorinated hydrocarbons may be present in common refrigerants and are harmful
if they enter the body via the breathing passages. Name the parts of the human
body that may be affected. (4 marks)
________________________________________________________________
43 Name 2 electrical items that may contain polychlorinated biphenyls (PCBs). (2 marks)
________________________________________________________________
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Total marks /15

UEENEEE137A Ed1 1 LA020088, Assignment 2

UEENEEE137A, Assignment 2 (New South Wales Technical and Further Education Commission, 2015 (TAFE NSW – WSI), Version 1, September 2015

What you should do

The material in topics 2, 3, 4, 5, and 6 from the knowledge base is covered in this assignment.

UEENEEE137A unit specification KS01-EE137A.

If possible, answer in the space provided, but if necessary, use separate paper. The

Because the entire assignment will be returned to you, answering the questions on the assignment allows you to learn more.

feedback that is simple to comprehend

For you to insert the letter, brackets with multiple choice questions have been given.

in accordance with your response

Keep your replies clear and succinct while answering short answer questions, and make sure you answer all of the questions.

as stated in the question

Maintain clarity in your