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WESTERN CAPE BRANCH ENGINEERING
BULLETIN - 1997 EDITIONS
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Electricity and the Metal Ladder - electrocution
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OHSA: Special functions of inspectors.
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Examination model answers: Plant
A refrigeration plant uses Freon 12 as a working fluid and operates
between pressure limits 270 kPa and 840 kPa......
(i) the actual coefficient of performance
(ii) the refrigeration capacity (kJ/s)
(iii) the power required to drive the compressor (kW)
(b) Describe how you would evacuate the refrigerant from a large
refrigeration unit and how you would pressure test the condenser vessel.
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Examination model answers: Legal Knowledge
(a) Where an employer requires any person to enter any place from or
into which solid or particulate material is being discharged and where a
danger exists of a person being engulfed by such solid or particular
material, certain precautionary measures have to be taken. Name ALL
these measures.
(b) With regard to a structure being demolished, every employer who
performs building work shall, with respect to such demolition, ensure
that certain steps are taken. Name these steps.
(c) A person working in an elevated position, may only do so from
certain positions. Name these positions.
- Extruder accident - His right arm was drawn into the worm and severed
above .......
- Rare incident - A 15 tonne per hour, twin flue, coal-fired boiler
......low water condition.
- OHSA: Joint Enquiries; Appeal against decision of inspector; Acts or
omissions by employees or mandataries.
- Competent persons, must they carry the can?
- A case of lost records - boiler incident
- Examination model answers: Legal Knowledge
(a) A user purchased a used boiler. Name TWO requirements that must be
complied with before he may commission and permit the use of the boiler.
(b) Name THREE instances when a certificate of registration of a boiler
shall lapse.
(c) Define ‘registered person’ with respect to lifts, escalators and
passenger conveyers.
(d) The user of a lift is required to have it inspected at intervals not
exceeding thirty six months. A report shows defects
whereby persons may be endangered. The user has been informed about
this. State in terms of the regulation the action that the user must
take in the above scenario.
- Preventative measures - boiler incident
- Fatal Climb - an 11 year old climbed up a steel strut pole.........
- Fatal shock - while repairing a micro switch a fitter was
electrocuted..............
- OHSA: Offences penalties and special orders of court
- Examination model answers: Plant
(a) State the various aspects which the maintenance control system must
keep in correct balance.
(b) State the THREE time bases which must be used to create a
maintenance control system.
(c) A vital feature of any maintenance control system is a priority
system. State the essential characteristics of such a priority system.
- Examination model answers: Legal Knowledge
(a) Every employer who works with asbestos shall take steps to ensure
that every employee is systematically and thoroughly trained. Name FIVE
aspects which must be included in the training of these employees, as
mentioned in the regulations.
(b) The workplace in your factory has specialised lighting.Name the
requirements called for by the regulations in respect of lighting which must be complied with.
- Fatal vapour explosion; workers inside a tank.....hydrocarbon vapour
.........
- Case study: Medium voltage PF correction; Mutual Park
- OHSA: The employer or user is required to appoint a Competent Person
..........
- Computers: 1981 to beyond 2000. W
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