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






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






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






4. Or Hertz; The measurement of the time period of one alternating electric current. In the United States this is commonly 60 cycles per second - or 60 Hertz.






5. 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.






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






7. ISA;






8. LED; A solid state light source component that emits light or invisible infrared radiation.






9. Electric and magnetic force field that surrounds a moving electric charge.






10. One millionth of an amp.






11. See; 'Proximity Sensor'.






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






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






14. 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.






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






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






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






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






19. One thousandth of an inch.






20. The form of radiation used to make non-contact temperature measurements. In the electromagnetic spectrum it is the area beyond red light from 760 nanometers to 1000 microns.






21. Very High Frequency.






22. An electromagnetic radiation produced when the inner satellite electrons of heavy atoms have been excited by collision with a stream of fast electrons return to their ground state - giving up the energy previously imparted to them.






23. 'American Wire Gauge' system used to determine wire size.






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






25. 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.






26. The time delay between the output signal and the response time of the receiver of the signal.






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






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






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






30. Symbol for Mega - one million.






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






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






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






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






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






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






37. See; 'Maximum Power Rating'.






38. A three mode control consisting of time Proportioning - Integral and Derivative rate action.






39. The interaction of magnetism and electrical current.






40. IEEE;






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






42. A connected path to earth or to a conductive body that has a reference potential to earth.






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






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






45. A variable resistor.






46. NEMA;






47. UL; ~LINK~






48. Pressure that is less than atmospheric pressure.






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






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







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