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LA020088_Assn2_UEENEEE137A_Ed1.pdf

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LA020088, Assignment 2, UEENEEE137A Ed1 1

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

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.

________________________________________________________________

3 Name a toxic gas which may build up in an enclosed tank.

________________________________________________________________

4 Name one type of work activity involving a certain wood type which is a dangerous

wood dust hazard.

________________________________________________________________

5 Where may an electrician be exposed to legionella bacterium?

________________________________________________________________

6 Describe a serious hazard when cutting and joining fibre optics.

________________________________________________________________

7 Name 2 locations in some cottage type premises where asbestos can be found. (2 marks)

________________________________________________________________

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)

________________________________________________________________

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

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.

________________________________________________________________

13 What do the letters MSDS stand for?

________________________________________________________________

Total marks /15

4 LA020088, Assignment 2, UEENEEE137A Ed1

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)

________________________________________________________________

http://wwwyoutubecom/watch?v=HaSeu7-YG1M

http://wwwsafeworkaustraliagovau/sites/SWA/about/Publications/Documents/699/Managing%20Electrical%20Risks%20in%20the%20Workplacepdf

LA020088, Assignment 2, UEENEEE137A Ed1 5

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)

________________________________________________________________

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,

(d) releasing hydraulic pressure,

(e) releasing steam pressure,

(f) blocking movement of parts,

(g) releasing spring tension

6 LA020088, Assignment 2, UEENEEE137A Ed1

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)

________________________________________________________________

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.