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






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






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






4. MA; One thousandth of an amp.






5. A variable resistor.






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






7. One thousandth of an inch.






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






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






10. 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.






11. Symbol used to denote transformer.






12. CSA ~LINK~






13. One millionth of a volt.






14. 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






15. IBEW;






16. One millionth of a meter.






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






18. 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(-).






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






20. 'British Thermal Unit' - the amount of thermal energy required to raise one pound of water 1degree F. One BTU is equal to .293 watt hours. One kWh is equal to 3412 BTUs.






21. 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.






22. SI; The standard metric system of units.






23. Radio Frequency Interference.






24. 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






25. Current Consumption. The amount of amps or milliamps needed to maintain operation of a control or device.






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






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






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






29. 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.






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






31. See; 'Proximity Sensor'.






32. IEC;






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






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






35. Chemical changes and energy produced by electric currents.






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






37. (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'






38. A meter used to measure units of volts.






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






40. Variable Frequency.






41. Protective circuitry to guard against spikes that might be induced on the supply line.






42. Voltage; The unit of electromotive force (EMF) that causes current to flow. One volt causes a current of one amp through a resistance of one ohm.






43. ISA;






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






45. Resistance Temperature Detector.






46. UL; ~LINK~






47. NEMA;






48. The standard that is used to make comparison measurements or calibrations.






49. A process that is kept at a constant temperature.






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