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






2. Output power divided by input power - (work performed in ratio to energy used to produce it).






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






4. The time based relationship between a reference and a periodic function.






5. 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






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






7. LED; A solid state light source component that emits light or invisible infrared radiation.






8. FM; ~LINK~






9. A three terminal semiconductor device. In a 'FET' the current is from source to drain because a conducting channel is formed by a voltage field between the gate and the source.






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






11. MA; One thousandth of an amp.






12. A hypothetical nuclear of a quark plus an antiproton.






13. The energy delivered by a circuit or device. The electrical signal produced by the input to the transducer.






14. A reference point at zero potential with respect to the earth. In an electronic circuit it is the common return path for electric current. A conducting connection between the earth and an electrical circuit or electrical equipment. Also - the negativ






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






16. Symbol used to denote transformer.






17. Magnetically - opposite poles - north and south. In electricity - oppositely charged poles - positive and negative.






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






19. A highly accurate bridge configuration that is used to measure three-wire RTD thermometers.






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






21. UL; ~LINK~






22. Very High Frequency.






23. A high-intensity incandescent lamp with a quartz bulb containing an inert gas of iodine or bromine vapor.






24. '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.






25. 'American Wire Gauge' system used to determine wire size.






26. One millionth of a meter.






27. The pronounced curvature in reverse voltage current that is characteristic of a diode.






28. The method by which two devices or systems are connected and interact with each other.






29. NFPA;






30. The rapid on/off cycling of a relay caused by improper signal or adjustment - faulty contacts - or other malfunction.






31. 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.






32. The quality of having the ability to emit light when struck by electrons or another form of radiation.






33. 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.






34. IBEW;






35. Pressure that is less than atmospheric pressure.






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






37. One thousandth of an inch.






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






39. 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.






40. The rate of transfer of energy.






41. (DC); Electrical current that flows consistently in one direction only.






42. A coil of wire wound about a magnetic material - such as iron - that produces a magnetic field when current flows through the wire.






43. The power of one watt operating for one hour - and equal to 3 -600 joules.






44. Normally Closed.






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






46. ANSI;






47. Current Consumption. The amount of amps or milliamps needed to maintain operation of a control or device.






48. Volt-ohm Meter.






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






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.