Western Cape Engineering Bulletins 2002

Respect for grindstones. fractured cheekbone while grinding ..................................
Steam for processing. saturated steam and superheated steam .......................
That strange question. Employing a disabled person as a boiler attendant ............
Examination model answers. Legal knowledge-Nov 2001
In terms of the Electrical Machinery Regulations, state in point form:
(a) Any FIVE of the seven requirements that must be complied with in respect of enclosed premises housing switchgear and transformers.
(b) FOUR requirements that a portable electric light must comply with when the operating voltage exceeds 50 volt.
(c) One additional requirement if the portable electric light is to be used inside metal vessels.
(d) TWO requirements that must be complied with when an electric fence is installed along a public road or in an urban area.
(e) THREE prohibiting requirements that must be adhered to where the fence energiser of the electric fence receives it energy from an electric power system.

April 2002

Goods hoist fatal accident. Investigation found that the hoist did not comply with regulations applicable....
Examination model answers. Legal knowledge-Nov 2001
In terms of the Driven Machinery Regulations answer the following questions on machine guarding:
(i) What type of cutter block is allowed for an overhand wood planing machine, which is not mechanically fed?
(ii) Name the guard prescribed for an overhand planing machine and briefly describe its requirements.
(iii) When planing flat pieces of wood on an overhand planing machine which is not mechanically fed, what is the minimum length allowed?
(iv) What precautions are prescribed by the regulations to keep dangerous moving parts of mixing and agitating machines beyond the reach of persons?
(v) What are the requirements in respect of the doors or covers of mixing and agitating machines which are not bolted down to prevent exposure to dangerous moving parts?
(vi) What are the regulation requirements before a user may permit the use of refrigeration and air-conditioning plants?
(vii) What are the regulation requirements in respect of the muzzle and firing mechanism of an explosive powered tool which is not fitted with an intermediate piston to transmit energy?
(viii) Name the FOUR optional methods of guarding mentioned in the regulations to protect against the danger of rotating rolls of a power-operated machine and briefly state the operational requirements. Ignore the exclusions.

Draft construction regulations.
Brick making fatality. Locking out of a panmill...............
How do you plead? Guilty or not guilty. Discuss and explain, in terms of South African Law and Management practice the following terms:
(a) vicarious liability
(b) diligens paterfamilias

Project Management. Part 1.
A dangerous ride. Worker fatally injured by load moving on vehicle ...............
English as it should be spoke.
Examination model answers. Plant Engineering-Nov 2001
A vibrating screen is modified and will now be suspended from four closely coiled extension springs. The total loaded mass of the screen is 3,54 t. Calculate suitable dimensions for the manufacture of such springs. The D/d is 5,88, the maximum torsional stress 450 Mpa and the modulus of rigidity 80 Gpa. The extension under load must not exceed 155 mm. There is no initial tension in the wire.
Calculate:
(a) the diameter of the wire
(b) the mean coil diameter
(c) the number of coils

Gantry crane collapse. A 25 metric tonne crane portal gantry crane .....cantilever extension tore free.....
Wind Power - Eskom.
Project Management Part 2

Pressure failure during test. fractured as result of the temperature of the water used, and consequently the temperature of the metal, being too low ........................
Project management Part 3.
Cricket and the ashes.
Technical registration.