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. The standard unit of magnetic flux.






2. The unit for capacitance. A capacitor that stored one coulomb of charge with one volt across it will have a value of one farad.






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






4. That part of a circuit which is physically interconnected.






5. One millionth of an amp.






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






7. The amount of heat needed to convert one pound of water to one pound of steam. Latent heat is expressed in BTU per pound.






8. A temperature scale. Also known as centigrade. Sea level water will freeze at 0






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






10. Electrical energy produced by the action of heat.






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






12. The amount of power that is consumed and converted to heat.






13. SI; The standard metric system of units.






14. Kwh; One thousand watt-hours.






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






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






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






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






19. FM; ~LINK~






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






21. See; 'Proximity Sensor'.






22. 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.






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






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






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






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






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






28. CSA ~LINK~






29. When there is current through a semiconductor p-n junction it is the resistance of a forward-biased junction.






30. A device used to store electrical energy in an electrostatic field until discharge.






31. A panel meter with zero and span adjustments - commonly scaled for signals such as 1-5 volts - 4-20mA - etc.






32. MA; One thousandth of an amp.






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






34. -459.67






35. European environmental ratings. Similar to NEMA ratings in the USA. IP;*site has NEMA comparisons ~LINK~






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






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






38. See; 'Maximum Power Rating'.






39. An electrical circuit that increases the power - voltage or current of an applied signal.






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






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






42. The rate at which electricity flows - measured in amperes - 1 ampere = 1 coulomb per second.






43. 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.






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






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






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






47. 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






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






49. Symbol used to denote transmitter.






50. The rate of transfer of energy.