Unit –
TERM 3: Formal assessment task: PAT
Scenario: A commercially viable ore body containing platinum group metals has been found on land belonging to a tribe in rural South Africa. Drill samples have proved that the reef lies at a relatively shallow depth only 500m below surface. A decision has been taken to sink a shaft to this depth to conduct bulk sampling on a small scale before deciding on a mining method best suited for the size and value of the resource. Your mechanical engineering company decides to submit a tender for the construction of shaft head-gear suitable to transport miners to and from the work level, and for raising ore and waste in loads not exceeding 10 tons at a time. Investigate: Lifting mechanisms (wire rope-driven mine head-gear) in use at South African mines for raising people and ore. Sketch: initial idea sketches to meet the requirements given in the scenario. Design brief with specifications and constraints.
Simulation: teams form mechanical engineering companies. They evaluate sketches of individuals and select the best idea for the team tender bid. Drawings for the shaft head-gear – each learner draws a: • 3-D isometric drawing of the selected design giving dimensions and drawn to scale. • 2-D working drawing showing one or more views with dimensions and lines. Budget: teams prepare a realistic budget detailing expected costs of constructing a real mine shaft headgear, detailing valid prices of materials and labour costs of the range of workers who would be involved in designing and building such a device. Make: teams build their working scale model using safe working practices.
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Communicate: teams present their tender proposal for the mine shaft headgear (research, plans, flowchart, model and budget) to the “Tender Board”. Formal assessment task: Test
Learner’s Book page
124–127
Time
allocation (2 hours)
2
127–128
4
128 129–130
2 1
21
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