C.-3.

Subject S.— A Knowledge of Part V. of " The Mining Act, 1898." Oral examination.

Fifth Day.—Time : 5 p.m. Subject S.— A Knowledge of Part V. of " The Mining Act, 1898." Oral Examination. 1. From what parts of a mine worked from a shaft shall proper and distinct signals be provided ? 2. State the parts of a mine that should be securely fenced in or covered. 3. State how explosives should be stored in mine and on surface. 4. What persons are prohibited working in a mine ? 5. State how and when a manager is liable to a penalty. 6. What time is appointed for examining safety appliances and gear connected with cages, winding-ropes, buildings, machinery, and shafts, and the record of such examinations? 7. State what is the duty of any person employed in or about a mine before commencing work, and the steps to be taken if anything is found to be unsafe. 8. What steps should a manager take if an accident occurred with injury to a person ?

Questions used in the Examination of Battery Superintendents for Certificates. (" The Mining Act, 1898.") First Day.—Time : 9 a.m. to 12 noon. [The candidates will not be allowed any books other than logarithm tables during the time they are sitting for examination. They must attempt to answer every question, and all calculations must be shown in detail.] Subject A.— The Different Modes of Seducing and Pulverising Ores. 1. Give your experience in batteries. State when, where, and by whom you were employed. 2. What is the maximum speed that you could work stamps with a drop of 7 in. ? Show how you arrive at the result. 3. State how you would place dies in the mortar-box, and at what height above the bottom of screen you would place them when the dies are new, for wet and also for dry crushing, and give your reasons for same. 4. Show by calculation the weight of a stamp whose head and shoe is 21 in. long and 9 in. in diameter, and the stem 14ft. 6in. long and 3^in. in diameter, allowing the tappet to be 1401b. 5. Eequire the horse-power necessary to work twenty heads of stamps of 1,000 lb. each, with a drop of 6 in., and making ninety-five drops per minute, including friction of machinery. 6. Show by calculation the diameter of a nozzle you would require for a Pelton wheel to give the necessary power to drive a battery of twenty stamps of 1,000 lb. each, having a drop of 6 in. and making ninety-five drops per minute, including power absorbed by friction, the head of water above nozzle being 140 ft., and allowing the Pelton wheel to give 80 per cent, of the power of the water. 7. If you were erecting a stamp-mill with rock-breakers and ore-feeders, give the different heights from the bottom of the mortar-box to the bottom of the ore-hoppers, the floor where the rock-breakers are placed, and the level of the tramway to empty the ore from the mine into the bin that supplies the ore for the rock-breakers. 8. Describe the different classes of ball-mills used in crushing gold-ores, their capacity, and power required to work them. Subject B.— Amalgamating-machines. 1. In constructing tables covered with copper-plates from the mortar-box, what fall would you give them; and give your reasons for same ? 2. Give the speed you work Watson-Denny pans, and the horse-power required to work them; also, the quantity of material they treat per day of twenty-four hours. 3. At what angles would you set berdans ? Give the quantity of tailings each berdan would crush per day of twenty-four hours, the quantity of quicksilver you would use in each, the speed you would work them at, and the horse-power required. 4. Describe the different amalgamating-machines you have been accustomed to use, their advantages and disadvantages, the quantity of quicksilver used in each, the speed they were worked at, the quantity of tailings they would treat in twenty-four hours, the percentage of bullion you recovered from the assay value of the tailings.

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