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






2. One millionth of a meter.






3. 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.






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






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






6. Ultra High Frequency






7. 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






8. IBEW;






9. CSA ~LINK~






10. Symbol used to denote transformer.






11. The measure of the ability of a material or substance to carry electrical current.






12. The standard unit of magnetic flux.






13. The moving of electricity or heat through a conductor.






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






15. An electrical resistor composed of semiconductor material - whose resistance is a known rapidly varying function of temperature.






16. 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.






17. 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.






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






19. Very High Frequency.






20. A meter used to measure units of volts.






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. One millionth of a volt.






23. Volt-ohm Meter.






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






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






26. A form of energy produced by the flow of particles of matter and consists of commonly attractive positively (protons [+]) and negatively (electrons [-]) charged atomic particles. A stream of electrons - or an electric current.






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






28. The rate of transfer of energy.






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






30. NFPA;






31. ISA;






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






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






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






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






36. A material used to conduct electricity or heat.






37. 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






38. 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.






39. 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






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






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






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






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






44. The amount of energy released in a nuclear reaction. It is expressed in atomic mass units - or in million electron volts (MEV).






45. A variable resistor.






46. The mechanism of a switch which operates the contacts.






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






48. -459.67






49. Mm; One thousandth of a meter.






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