Performing Engineering Operations
Level 2
Mechanical & Electrical Engineering
Written Assignment
For
City & Guilds 7582 – Unit 36
Assembling and Testing Electronic Circuits.
Candidate name:-…………………………………..
1
SET 1 QUESTIONS (Due in on 16/11/2011)
1.
What are the specific safety practices and procedures that you need to
observe when assembling and testing electronic circuits?
To include: any specific legislation, regulations, or codes of practice for the activities, equipment or
materials.
2.
What are the hazards associated with assembling and testing electronic
circuits and how can they be minimised?
Such as: heat, toxic fumes, spilled/splashed chemicals/solder, static electricity, using sharp instruments
for stripping cable insulation, connecting clips/probes into circuits.
3.
Why is it important to wear appropriate protective clothing and equipment?
4.
Why is it important to keep the work area safe and tidy?
5.
What precautions do you need to take to prevent electrostatic discharge (ESD)
damage to circuits and sensitive components?
Such as: use of earthed wrist straps, anti-static mats, special packaging and handling areas.
6.
How do you use and extract information in relation to work undertaken?
To include: circuit diagrams, block and schematic diagrams, equipment manuals, data sheets, test
procedures and instructions (to include symbols and conventions to appropriate BS or ISO standards).
7.
What are the various types of circuit boards used?
Such as: printed circuit boards, thin film, thick film and flexible film circuitry.
8.
How do you recognise, read the values and identify polarity and any other
orientation requirements for all electronic components being used in the
assemblies?
Such as: capacitors, resistors, inductors, diodes, transistors, integrated circuit chips, and other discrete
through-hole or surface mounted components.
9.
How do you check that components meet the required specification/operating
conditions?
Such as: values, tolerance, current carrying capacity, voltage rating, power rating, working temperature
range.
10.
What are the basic principles of operation of the electronic circuits being
assembled?
11.
What is the purpose of the individual modules/components within the circuits?
12.
How and why is circuit protection equipment used?
Such as: fuses and other overload protection devices.
2
SET 2 QUESTIONS (Due in on 7/12/2011)
13.
What are the preparation requirements for components to be used in the
assembly?
Such as: pre-forming component pins/legs.
14.
What are the methods of mounting and securing electronic components to
various surfaces?
Such as: the use of manual soldering techniques, surface mount technologies and mechanical fixing
devices, use of heat sinks/shunts.
15.
What are the methods of attaching markers/labels to components or cables to
assist with identification?
Such as: colour coding conductors, using coded tabs.
16.
Why should you use BS7671/IEE wiring and other regulations, when selecting
wires and cables and when carrying out tests on electronic circuits?
17.
Why is it important to make visual checks of the completed assembly?
Such as: visual examination for excessive solder or solder spikes which may allow short circuits to occur,
correct orientation of components for pin configuration or polarity, obvious signs of damage (such as heat
damage) or strain on terminations.
18.
What tools and equipment are used in the electronic assembly activities?
To include: the use of cable stripping tools, crimping tools, soldering irons, specialist assembly tools.
19.
Why is it important to make sure that all tools are in a safe and serviceable
condition?
20.
Why is it important to make sure that all tools are used correctly?
21.
Why is it important to make sure that all tools are returned to their correct
location on completion of the assembly activities?
22.
How do you care for, handle and use electronic test and measuring
instruments?
Such as: multimeter, oscilloscope, signal generators, stabilised power supplies, logic probes/analyzers,
measuring bridges.
23.
How do you check test equipment is safe to use?
Such as: condition of power cables, using suitably fused test probes, clips and leads.
24.
How do you check equipment is within current calibration approval dates?
3
SET 3 QUESTIONS (Due in on 18/1/2012)
25.
How do you check that the test equipment is suitable for the tests you are to
carry out and can cover the range and values you are to measure?
26.
How do you connect equipment to an approved power supply and, where
appropriate, signal source?
27.
How do you identify correct test points in the circuit?
28.
How do you position test instruments into circuits without damaging circuit
components?
Such as: using test probes, ensuring correct polarity, taking anti-static precautions.
29.
How do you set instrument zero readings?
30.
How do you obtain instrument readings and compare them with expected
results.
31.
How do you make adjustments to circuit components?
32.
How do you make decisions on circuit performance and faulty components?
33.
How do you remove and replace faulty components?
34.
What are the fault-finding techniques to be used when the equipment fails to
operate correctly?
35.
When should you act on your own initiative and when should you seek help
and advice from others?
36.
Why is it important to leave the work area in a safe and clean condition on
completion of the electronic assembly and testing activities?
Such as: returning hand tools and test equipment to its designated location, cleaning the work area,
removing and disposing of waste.
4
Unit 36 Assembling and Testing Electronic Circuits.
Set 1 questions answered correctly: Yes….
No….
Set 2 questions answered correctly: Yes….
No….
Set 3 questions answered correctly: Yes….
No….
All questions answered correctly: Yes….
No….
Assessor Signature: ………………………
Candidate Signature: ……………………..
Date: …………..
Assessor feedback
Assessor Signature…………………….
Date………………
5