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1. Describe important features to consider when designing a workshop for open pit mining equipment maintenance. [12\%] 2. Describe the indirect cost of water in a pit. [12\%] 3. Answer the questions below with reference to the Whirtle results in the figure and the table attached on the pages below. Use the best case (blue or upper line) graph. Earn marks by good motivation of your answers. a. Which pit number is the optimal value pit? [2\%] b. Estimate the value of the optimal pit and also report the ore tonnes, waste tonnes and strip ratio of that pit shell [8\%] c. Decide which pit shell you will select if your company has a strategy to maximize Ore Reserves in their public reporting Motivate your selection. Provide the pit number, ore tonnes and strip ratio for your selected pit. [9\%6] d. If there was a risk of a fluctuating metal price with a good chance that the price may fall in the next 10 years, recommend the pit shell you will select and motivate your selection. Quote the pit number, estimated value, ore tonnes and total tonnes for your selected shell [12%] 4. With regard to environmental management of waste rock dumps, what is AMD, how is it formed and how will you manage dump construction to minimize its impact on the environment? [6\%] 5. Your company is considering buying Caterpillar 745 ADT trucks. With relerence to the lecture material, what ramp width will you recommend should be used? Motivate your answer by reference to Table 5.3 in the lecture material Show all calculations and dimensions. [15\%] 6. Evaluate the final pit design in the picture on the last page and identify areas with poor and good design features. Indicate these features on the picture and copy the picture with the features onto your answer page. List all the features you identified and comment on the quality of design with reference to the pit design criteria in the lecture material. [16\%]