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Electrical Components

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Voltage; The unit of electromotive force (EMF) that causes current to flow. One volt causes a current of one amp through a resistance of one ohm.






2. The moving of electricity or heat through a conductor.






3. Pounds per square inch gage. Pressure in relationship to the ambient air pressure>






4. The voltage that is applied across a semiconductor junction to permit forward current through that junction and the device. Forward voltage is also known as 'bias.'






5. A switching device used in switching high DC loads. It contains a small permanent magnet which deflects arc in order to quench it.






6. Normally Closed.






7. A full-wave rectifier where the diodes are connected in a bridge circuit. This allows the current to the load during both the positive and negative alternating of the supply voltage.






8. The part of a circuit that supplies power to the entire circuit or part of the circuit. Usually a separate unit that supplies power to a specific part of the circuit in a system.






9. The electrical demand of a process. Load can be expressed or calculated as amps (current) - ohms (resistance) or watts (power).






10. A solid-state switching device for semiconductors to convert AC current in one of two directions controlled by an electrode.






11. The output that is produced when one or more inputs are present.






12. Pressure that is less than atmospheric pressure.






13. A process that is kept at a constant temperature.






14. The basic of thermal energy. The work done by the force of one newton acting through a distance of one meter.






15. Volt-ohm Meter.






16. OSHA;






17. One millionth of a volt.






18. Symbol used to denote transmitter.






19. A device that transfers power or energy from one system to another - such as taking a physical quality and changing it to an electrical signal.






20. ISA;






21. A form of silicone dioxide. Commonly used in the making of radio transmitters and heat resistant products.






22. A sudden and unwanted increase or decrease of supply voltage or current.






23. Also known as Hertz - it is the number of complete cycles of periodic waveform that occur during a time period of one second.






24. -459.67






25. A positive (+) electrode. The point where electrons exit from a device to the external electric circuit.






26. Or Hertz; The measurement of the time period of one alternating electric current. In the United States this is commonly 60 cycles per second - or 60 Hertz.






27. The behavior of charged particles and the steady motion of charge in magnetic and electric fields.






28. The maximum temperature at which a device can be safely operated.






29. MLS; A photoelectric control that operates on pulsed infrared radiation at a specific frequency - and responds only to that frequency of pulse. MLS is used frequently in areas where ambient light may cause problems with other types of sensors.






30. kV; One thousand volts.






31. An anode (+) or cathode (-) conductor on a device through which an electric current passes.






32. Two dissimilar metals connected at a point - that produce an electrical current whose magnitude is dependent upon the temperature at the junction point.






33. A circuit element or components that allows signals of certain frequencies to pass and blocks signals of other frequencies.






34. The interaction of magnetism and electrical current.






35. One thousandth of an inch.






36. A negative (-) electrode. The point of entry of electrons into a device from an external circuit. The negative electrode of a semiconductor diode.






37. The element inside a vacuum tube - incandescent lamp or other similar device.






38. NEC: A set of regulations pertaining to electrical installation and design in the interest of the protection of life and property. The NEC is adopted by NFPA and approved by ANSI. It is the preferred standard of guidelines used by most electrical reg






39. The average temperature of a process.






40. An electromagnetic radiation produced when the inner satellite electrons of heavy atoms have been excited by collision with a stream of fast electrons return to their ground state - giving up the energy previously imparted to them.






41. The measure of the ability of a material or substance to carry electrical current.






42. A switch in a controller that manually resets after exceeding the controllers limit.






43. A controller whose action is either fully on or off.






44. Pounds per square inch absolute. Pressure commonly in reference to vacuum.






45. A circuit conductor that is grounded to become part of the electric circuit by design and intent.






46. Non-conducting material used to isolate and/or insulate energized electrical components.






47. Expressed in webers - it is the product of the average normal component of the magnetic intensity over a surface and the area of that surface.






48. Radio Frequency Interference.






49. Electric current passing through an electrolyte which produces chemical changes in it.






50. RMS; AC voltage that equals DC voltage that will do the same amount of work. For an AC sine wave it is 0.707 x peak voltage.