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. A device that converts AC voltage to pulsating DC voltage.






2. One millionth of a volt.






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






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






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






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






7. SI; The standard metric system of units.






8. An area in which combustible or flammable mixtures are or could be present.






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






10. The magnitude and time phase of a quantity - represented by a plotted line.






11. 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.






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






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






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






15. Volt-ohm Meter.






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






17. IBEW;






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






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






20. A solid-state switching device used in switching AC wave forms.






21. Kw; One thousand watts.






22. A tube - pipe or trough that carries and protects electric wiring.






23. One millionth of a meter.






24. Commonly used in generators and motors - it is an electromagnet formed from a coil of insulated wire that is wound around a soft iron core.






25. Variable Frequency.






26. A fundamental negatively (-) charged atomic particle that rotates around a positively (+) charged nucleus of the atom.






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






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






29. The amount of time it takes for a device to react to an input signal.






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






31. Ultra High Frequency






32. The standard unit of magnetic flux.






33. One of the very small discrete packets into which many forms of energy are subdivided.






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






35. IEEE;






36. Symbol used to denote transmitter.






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






38. 'Common Mode Voltage.' The voltage which is tolerable between signal and ground.






39. Applying molecular physics to electronics.






40. NEMA;






41. Symbol used to denote transformer.






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






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 resistance to electrical current. Resistance is measured in ohms.






45. Chemical changes and energy produced by electric currents.






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






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






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






49. The speed or time rate of change of displacement.






50. 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.