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






2. A small current leaking from an output device in the off state caused by semiconductor characteristics.






3. Radio Frequency Interference.






4. Kwh; One thousand watt-hours.






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






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






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






8. 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.






9. ISA;






10. 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.






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






12. A variable resistor.






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






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






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






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






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






18. A tube - pipe or trough that carries and protects electric wiring.






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






20. Silicone Controlled Rectifier.






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






22. Applying molecular physics to electronics.






23. MLS; A photoelectric control that operates on pulsed infrared radiation at a specific frequency - and responds only to that frequency of pulse. MLS is used frequently in areas where ambient light may cause problems with other types of sensors.






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






25. Kw; One thousand watts.






26. NEMA;






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






28. The conductor that is used by intent to connect the grounded circuit of an electrical wiring system or equipment to a grounding electrode with reference to earth.






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






30. Normally Closed.






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






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






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






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






35. 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.






36. In a temperature controller it is the output form that provides a current proportional to the amount of control that is required. Commonly it is the 4 to 20 milliamp current proportioning band that is used in the electronics industry.






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






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






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






40. 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.






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






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






43. 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.






44. Kva; One thousand volt amps.






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






46. FM; ~LINK~






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






48. The electrical demand of a process. Load can be expressed or calculated as amps (current) - ohms (resistance) or watts (power).






49. IEC;






50. One millionth of an amp.