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WESTERN CAPE BRANCH ENGINEERING
BULLETIN - 1998 EDITIONS
- OHSA - driven machinery regulations....
- User beware - fractured boiler tubes .......collapse of
sockets...........
- Case study - Medium Voltage power factor correction - Mutual Park
(final)
- The effect of a non-sinusoidal voltage source on the operation of a bank
of power factor correcting capacitors.
- Take care with Forklift trucks - the now deceased chose to
stand..............
- OHSA: Regulations concerning certificates of competency.
- How do you perform a hydraulic test on a large vertical vessel
............trapping air ............
- Examination model answers: Legal Knowledge. Health and safety standards.
- Examination model answers: Plant
A process plant which has an electrical demand of 5 MW at a lagging
power factor of 0,8 is supplied in parallel with a 4,8 MW separately
excited motor which has a demand of 5,333 MVA at a leading power factor
of 0,9. The system voltage is 11 kV. The motor drives a compressor which
delivers 50 000 m3/h of air.
(a) Four types of motor protection, other than thermal overload, and the
purpose of each one, have to be stated.
(b) The power factor of the complete reticulation system has to be
determined
- Fall of suspended scaffold
- OHSA: GSR 2 to 4
- Examination model answers: Legal Knowledge. State five regulation requirements ..........when a person enters a
confined space.
- Examination model answers: Plant
a) The candidate has to define the term hazard with respect to a
workplace.
b) An explanation has to be given of the following concepts:
(i) how the work process is affected by hazards;
(ii) how hazards can be controlled;
(iii) the chief causes of accidents;
c) The candidate has to state four activities that are essential to
effective accident prevention.
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