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 transfers power or energy from one system to another - such as taking a physical quality and changing it to an electrical signal.






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






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






4. One millionth of a meter.






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






6. The rate of transfer of energy.






7. One thousandth of an inch.






8. (AC); Electrical current that changes (or alternates) in magnitude and direction of the current at regular intervals.






9. IEC;






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






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






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






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






14. A form of control where the power supplied to a process is controlled by limiting the phase angle of the line voltage.






15. The unit by which electrical resistance is measured. One ohm is equal to the current of one ampere which will flow when a voltage of one volt is applied






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






17. A form of silicone dioxide. Commonly used in the making of radio transmitters and heat resistant products.






18. The interaction of magnetism and electrical current.






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






20. To close an electrical circuit. To establish an electrical circuit through the closing of a contact - switch or other related device.






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






22. OSHA;






23. Resistance Temperature Detector.






24. 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.






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






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






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






28. A Solid State relay is a switching device that completes or interrupts a circuit electrically and has no moving parts. A Mechanical relay is an electromechanical device that closes contacts to complete a circuit or opens contacts to interrupt a circu






29. (ampere)The basic unit of current in an electrical circuit. One ampere is the rate of flow of electric current when one coulomb of charge flows past a point in the circuit in one second. Symbolically characterized by the letter 'I' and sometimes 'A'






30. An arrangement of any of various conductors through which electric current can flow from a supply current.






31. ISO;






32. 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






33. Normally Open.






34. CSA ~LINK~






35. kV; One thousand volts.






36. 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.






37. 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(-).






38. NEMA;






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






40. Variable Frequency.






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






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






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






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






45. A switch in a controller that manually resets after exceeding the controllers limit.






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






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. UL; ~LINK~






49. 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.






50. Very High Frequency.