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. UL; ~LINK~






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






3. ISO;






4. A solid-state switching device for semiconductors to convert AC current in one of two directions controlled by an electrode.






5. Volt-ohm Meter.






6. Variable Frequency.






7. Resistance Temperature Detector.






8. A coil of wire wound about a magnetic material - such as iron - that produces a magnetic field when current flows through the wire.






9. Pressure that is less than atmospheric pressure.






10. A controller whose action is either fully on or off.






11. The current that is gained by a transistor when it is connected in a common emitter circuit.






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






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






14. 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.'






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






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






17. Mm; One thousandth of a meter.






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






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






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






21. ISA;






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






23. A fundamental negatively (-) charged atomic particle that rotates around a positively (+) charged nucleus of the atom.






24. The part of a circuit that supplies power to the entire circuit or part of the circuit. Usually a separate unit that supplies power to a specific part of the circuit in a system.






25. Radio Frequency Interference.






26. The delayed period of time when outputs are turned off when power is initially applied.






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






28. A meter used to measure units of volts.






29. 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






30. A device used to store electrical energy in an electrostatic field until discharge.






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






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






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






34. See; 'Maximum Power Rating'.






35. Symbol used to denote transformer.






36. The opposition to electrical flow.






37. IEC;






38. Kwh; One thousand watt-hours.






39. One thousandth of an inch.






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






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






42. A negative (-) electrode. The point of entry of electrons into a device from an external circuit. The negative electrode of a semiconductor diode.






43. One of the very small discrete packets into which many forms of energy are subdivided.






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






45. The basic of thermal energy. The work done by the force of one newton acting through a distance of one meter.






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






47. 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.






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






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






50. Silicone Controlled Rectifier.