A professional who tends crushers, ovens, and screens to test samples of ore. Respnsibilities include:

• Starts crusher to pulverize ore.
• Removes ore from crusher and places it in oven to dry.
• Sends portion of sample to laboratory for chemical analysis.
• Places sample in vibrator containing magnets and water.
• Starts vibrator to separate magnetic content of ore from impurities.
• Drains water from vibrator and weighs magnetic remainder.
• Pours ore sample through series of vibrating screens of different size openings to separate ore samples.
• Weighs and records each size of ore.
• Records number of tests performed.
• May collect ore samples from various sites in plant or mine, and record origin of samples.
• May perform chemical sedimentation or hardness tests on samples.