Test your basic knowledge |

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. 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






2. A unit of electric charge. The amount of charge conveyed in one second by one ampere.






3. A meter used to measure electrical resistance in units of ohms.






4. Intensity. The commonly used symbol used to represent Amperes when used in formulas. I = Intensity = Current = Amps = Amperes.






5. An interconnected arrangement of parts for carrying high-voltage electricity.






6. ANSI;






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






8. Electric and magnetic force field that surrounds a moving electric charge.






9. kV; One thousand volts.






10. The measured amount of electrical energy that represents the electrostatic forces between atomic particles. The nucleus of an atom has a positive charge (+) and the electrons have a negative charge(-).






11. The time it takes for a controller to complete one on/off cycle.






12. 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.






13. Normally Closed.






14. 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.






15. A form of energy produced by the flow of particles of matter and consists of commonly attractive positively (protons [+]) and negatively (electrons [-]) charged atomic particles. A stream of electrons - or an electric current.






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






17. A variable resistor.






18. Electrical energy produced by the action of heat.






19. Chemical changes and energy produced by electric currents.






20. 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.






21. ISO;






22. Kva; One thousand volt amps.






23. 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.






24. Symbol used for wye configuration for three phase electrical connections.






25. Pounds per square inch differential. The difference in pressure between two points.






26. An ionized gas containing about equal numbers of positive and negative charges - which is a good conductor of electricity - and is affected by a magnetic field.






27. UL; ~LINK~






28. A device having two terminals and has a low resistance to electrical current in one direction and a high resistance in the other direction.






29. The maximum watts that a device can safely handle.






30. In a temperature controller it is the output form that provides a current proportional to the amount of control that is required. Commonly it is the 4 to 20 milliamp current proportioning band that is used in the electronics industry.






31. An electrical circuit that is not 'made'. Contacts - switches or similar devices are open and preventing the floe of current.






32. 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.






33. The current that is gained by a transistor when it is connected in a common emitter circuit.






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






35. IEEE;






36. FM; ~LINK~






37. NFPA;






38. 'British Thermal Unit' - the amount of thermal energy required to raise one pound of water 1degree F. One BTU is equal to .293 watt hours. One kWh is equal to 3412 BTUs.






39. An electrically conductive fused salt or a solution where the charge is carried by ionic movement.






40. 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.






41. A sensor or switch with the ability to detect it's relationship to a metal target without making physical contact.






42. 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.






43. The form of radiation used to make non-contact temperature measurements. In the electromagnetic spectrum it is the area beyond red light from 760 nanometers to 1000 microns.






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






45. The rate of transfer of energy.






46. MV; One thousandth of a volt. The difference in potential needed to cause a current of one milliampere flow through a resistance of one ohm.






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






48. See; 'Maximum Power Rating'.






49. OSHA;






50. A silicone semiconductor that maintains a fixed voltage in a circuit.