Candidates drew poor map outlines generally. Consequently, the insertion of these minerals at the required location were not precise. The description of the method of mining columbite was not widely known by the candidates. The expected answers are:
-open cast;
-removal of overburden;
-application of dynamites andexplosives;
-usage of mechanical shovels, pick axes;
-dragline collects into heaps;
-usage of monitors to wash the ore;
-usage of trucks to convey ore to factory for smelting;
-conveyance by rail for export.
The candidates were able to write the adverse effects of mining in the area of operation correctly.
