How important is regular maintenance and repair of equipment in your daily life?, Have you ever experienced a problem with a power supply at home or at work? What happened?, Why is ground control particularly important in underground mining?, Which do you think is more important in a mine: power supply or water control? Why?, Do you think companies should spend more money on auxiliary operations or on their main mining activities? Why?, Which area requires the most highly trained workers: construction, ground control, power distribution, or maintenance and repair?, What could happen to a mine if its power distribution system suddenly failed?

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