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






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






3. ISO;






4. One millionth of a meter.






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






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






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






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






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






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






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






12. A switch in a controller that manually resets after exceeding the controllers limit.






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






14. Expressed in webers - it is the product of the average normal component of the magnetic intensity over a surface and the area of that surface.






15. A high-intensity incandescent lamp with a quartz bulb containing an inert gas of iodine or bromine vapor.






16. EPA; ~LINK~






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






18. See; 'Proximity Sensor'.






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






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






21. The rate of transfer of energy.






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






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






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






25. Symbol used to denote transformer.






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






27. ANSI;






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






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






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






31. 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






32. A device having two terminals and has a low resistance to electrical current in one direction and a high resistance in the other direction.






33. Pounds per square inch absolute. Pressure commonly in reference to vacuum.






34. A meter used to measure units of volts.






35. The range of voltage needed to maintain operation of a control or device.






36. One millionth of an amp.






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






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






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






40. Resistance Temperature Detector.






41. The behavior of charged particles and the steady motion of charge in magnetic and electric fields.






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






43. 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.






44. 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.






45. A form of control where the power supplied to a process is controlled by limiting the phase angle of the line voltage.






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






47. Kw; One thousand watts.






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






49. 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.






50. Volt-ohm Meter.







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