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






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






3. 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.






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






5. A device - instrument or component that will not produce any spark or thermal effects under any conditions that are normal or abnormal that will ignite a specified gas mixture. Electrical and thermal energy limits are at levels incapable of causing i






6. 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.






7. 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.






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






9. A hypothetical basic subatomic nuclear particle believed to be the basic component of protons - neutrons - etc.






10. CSA ~LINK~






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






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






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






14. The opposition to electrical flow.






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






16. Symbol used to denote transmitter.






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






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






19. NEMA;






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






21. 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.






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






23. 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






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






25. The difference in potential measured between two points caused by resistance or impedance.






26. Normally Open.






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






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






29. Kva; One thousand volt amps.






30. OSHA;






31. NFPA;






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






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






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






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






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






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






38. The time delay between the output signal and the response time of the receiver of the signal.






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






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






41. Variable Frequency.






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






43. Inspection - analysis and action required to ensure quality of output.






44. The increase of the power level - current or voltage of a signal. In an amplifier it is the ratio of the output to the input signal levels.






45. In a three phase connection all three phases are connected in series thus forming a closed circuit.






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






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






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






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






50. 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.