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. OSHA;






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






3. The range of temperature over which a device may be safely used. The temperature range which the device has been designed to operate.






4. Resistance Temperature Detector.






5. The maximum watts that a device can safely handle.






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






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






8. A variable resistor.






9. 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.






10. 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.






11. A material used to conduct electricity or heat.






12. 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






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






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






15. UL; ~LINK~






16. Symbol used to denote transmitter.






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






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






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






20. 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.






21. 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






22. A device incorporating semiconductor material and suitable contacts capable of performing electrical functions (such as voltage - current or power amplification) with low power requirements.






23. The range of voltage needed to maintain operation of a control or device.






24. The rate of transfer of energy.






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






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






27. SI; The standard metric system of units.






28. The voltage that is applied across a semiconductor junction to permit forward current through that junction and the device. Forward voltage is also known as 'bias.'






29. Normally Closed.






30. NEMA;






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






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






33. A silicone semiconductor that maintains a fixed voltage in a circuit.






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






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






36. See; 'Maximum Power Rating'.






37. ANSI;






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






39. 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.






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






41. kV; One thousand volts.






42. The modification of a signal that causes the output to remain energized until it is released by intent.






43. A meter used to measure units of volts.






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






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






46. A variable resistor.






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






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






49. Silicone Controlled Rectifier.






50. The interaction of magnetism and electrical current.