UNIT 1: Maintenance and Operation of Electronic Power Control Equipment, crossword

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Across
  1. 2. A non-metallic element, occurring in minerals and rocks and making up more than one fourth of the earth’s crust. Used in steelmaking, computer chips, etc.
  2. 3. To unite pieces of metal or plastic together by softening with heat and hammering or by fusion.
  3. 5. A furnace in which heat is generated by an electric arc.
  4. 8. A device for producing a current of air by the revolving movement of one or more blades.
  5. 10. A transducer that produces an output with a range of voltages whose ratio is smaller than that of the range of the input signal.
  6. 11. A semiconductor device that amplifies, oscillates, or switches the flow of current between two terminals by varying the current or voltage between one of the terminals and a third.
  7. 12. A method of adding a dopant to a pure semiconductor to change its electrical properties.
  8. 14. A machine for pushing or sending air through something.
  9. 15. A semiconductor device having two stable states, used as an electronic switch.
  10. 18. An electrical grid which includes a variety of operation and energy measures including smart meters, smart appliances, renewable energy resources and energy efficient resources.
  11. 21. A machine for grinding or crushing any solid substance.
  12. 23. A substance, such as silicon, that can conduct electricity with less efficiency than a true conductor.
  13. 26. An Uninterrupted Power Supply is an electrical apparatus that provides emergency power to a load when the input power source fails.
  14. 27. A moving platform or cage for carrying people or freight from one level to another, as in a building.
Down
  1. 1. The application of solid-state electronics to the control and conversion of electric power.
  2. 4. Alternating Current power is standard electricity that comes out of power outlets and is defined as a flow of charge that exhibits a periodic change in direction.
  3. 6. Flexible AC Transmission System is a system composed of static equipment used for the alternating current (AC) transmission of electrical energy.
  4. 7. A vehicle having two power-operated horizontal prongs that can be raised or lowered for loading, transporting, and unloading goods.
  5. 9. Direct Current power is a linear electrical current that moves in a straight line.
  6. 13. A pyroprocessing device used to raise materials to a high temperature (calcination) in a continuous process.
  7. 16. A power transmission system that uses high-voltage direct current (HVDC) for the bulk transmission of electrical power.
  8. 17. A pulley traveling on an overhead track and serving to support and move an object hung from it or a small truck or car operated on a track, as in a factory
  9. 19. A device for turning on or off or directing an electric current.
  10. 20. A device which compensates for the reactive power of the load connected to a power system. Also known as SVC (Static VAR Compensation).
  11. 22. An apparatus or machine for raising, pushing in or out, or compressing fluid or gases.
  12. 24. A large device for lifting and moving very heavy objects.
  13. 25. A device through which current can pass freely in only one direction.