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. ANSI;






2. Commonly used in generators and motors - it is an electromagnet formed from a coil of insulated wire that is wound around a soft iron core.






3. 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.






4. ISA;






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






6. Ultra High Frequency






7. The power of one watt operating for one hour - and equal to 3 -600 joules.






8. An electrical circuit that is not 'made'. Contacts - switches or similar devices are open and preventing the floe of current.






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






10. Normally Open.






11. Symbol used for wye configuration for three phase electrical connections.






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






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






14. 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.






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






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






17. An ionized gas containing about equal numbers of positive and negative charges - which is a good conductor of electricity - and is affected by a magnetic field.






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






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






20. 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.






21. EPA; ~LINK~






22. NFPA;






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






24. 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.






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






26. Mm; One thousandth of a meter.






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






28. Symbol for Mega - one million.






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






30. 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






31. A solid-state switching device used in switching AC wave forms.






32. 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.






33. Symbol used to denote transformer.






34. CSA ~LINK~






35. MA; One thousandth of an amp.






36. '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.






37. A hypothetical basic subatomic nuclear particle believed to be the basic component of protons - neutrons - etc.






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






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






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






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






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






43. Kw; One thousand watts.






44. The energy delivered by a circuit or device. The electrical signal produced by the input to the transducer.






45. Very High Frequency.






46. Pounds per square inch gage. Pressure in relationship to the ambient air pressure>






47. The maximum temperature at which a device can be safely operated.






48. 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.






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






50. 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.