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. IEEE;






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






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






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






5. 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.






6. 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






7. 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






8. The adjustment of a display that results are zero on the display corresponding to a non-zero signal.






9. A unit of energy in solid-state physics with mass and momentum but that does not exist as a free particle.






10. A circuit which may have one or many resistors and/or other various devices connected in a series so that the current has only one path to follow.






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






12. A unit of electrical current named after French physicist Andr






13. 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






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






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






16. -459.67






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






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






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






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






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






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






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






24. Very High Frequency.






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






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






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






28. IEC;






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






30. 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.






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






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






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






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






35. A region of space that surrounds a moving electrical charge or a magnetic pole - in which the electrical charge or magnetic pole experiences a force that is above the electrostatic ones associated with particles at rest.






36. kV; One thousand volts.






37. Symbol used to denote transformer.






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






39. Applying molecular physics to electronics.






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






41. See; 'Maximum Power Rating'.






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






43. The rate of transfer of energy.






44. 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.






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






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






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






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






50. A full path of electrical current from a voltage source that passes completely from one terminal of the voltage source to another.