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. NEMA;






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






3. The voltage that is applied across a semiconductor junction to permit forward current through that junction and the device. Forward voltage is also known as 'bias.'






4. ANSI;






5. 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






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






7. Symbol used to denote transmitter.






8. IEC;






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






10. One thousandth of an inch.






11. A unit of electric charge. The amount of charge conveyed in one second by one ampere.






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






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






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






15. Normally Closed.






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






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






18. 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.






19. The output that is produced when one or more inputs are present.






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






21. The amount of power that is consumed and converted to heat.






22. The opposition to electrical flow.






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






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






25. One millionth of a meter.






26. A device used to store electrical energy in an electrostatic field until discharge.






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






28. Applying molecular physics to electronics.






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






30. Normally Open.






31. -459.67






32. Volt-ohm Meter.






33. ISO;






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






35. Variable Frequency.






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






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






38. SI; The standard metric system of units.






39. The unit by which electrical resistance is measured. One ohm is equal to the current of one ampere which will flow when a voltage of one volt is applied






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






41. The interaction of magnetism and electrical current.






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. 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.






44. 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.






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






46. 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.






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






48. 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.






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






50. FM; ~LINK~