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 switch with contacts that are made with actuating force and released when that force is removed.






2. 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.






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






4. Radio Frequency Interference.






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






6. 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






7. ISA;






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






9. One millionth of a meter.






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






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






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






13. See; 'Maximum Power Rating'.






14. Symbol used to denote transmitter.






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






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






17. 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.






18. See; 'Proximity Sensor'.






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






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






21. A variable resistor.






22. MV; One thousandth of a volt. The difference in potential needed to cause a current of one milliampere flow through a resistance of one ohm.






23. One millionth of an amp.






24. A rise and fall of voltage - current - or other faction that would be constant under normal conditions. A pulse that is intentionally induced will have a finite duration time.






25. Variable Frequency.






26. MA; One thousandth of an amp.






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






28. Chemical changes and energy produced by electric currents.






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






30. Ultra High Frequency






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






32. The unit of power. One watt equals one joule per second - 1/746th horsepower.






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






34. 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.






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






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






37. 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.






38. The resistance to electrical current. Resistance is measured in ohms.






39. The rate of transfer of energy.






40. Response to the change in the level of the input signal.






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






42. -459.67






43. Symbol used to denote transformer.






44. A small current leaking from an output device in the off state caused by semiconductor characteristics.






45. FM; ~LINK~






46. Kw; One thousand watts.






47. Kva; One thousand volt amps.






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






49. Normally Closed.






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