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. Applying molecular physics to electronics.






2. 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.






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






4. 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.






5. A variable resistor.






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






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






8. A material used to conduct electricity or heat.






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






10. EPA; ~LINK~






11. Symbol used to denote transmitter.






12. 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.'






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






14. An area in which combustible or flammable mixtures are or could be present.






15. 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






16. The average temperature of a process.






17. Current Consumption. The amount of amps or milliamps needed to maintain operation of a control or device.






18. A unit of energy in solid-state physics with mass and momentum but that does not exist as a free particle.






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






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






21. IBEW;






22. The speed or time rate of change of displacement.






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






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






25. Symbol for Mega - one million.






26. A circuit conductor that is grounded to become part of the electric circuit by design and intent.






27. Mm; One thousandth of a meter.






28. A form of silicone dioxide. Commonly used in the making of radio transmitters and heat resistant products.






29. Variable Frequency.






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






31. MA; One thousandth of an amp.






32. Normally Open.






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






34. Normally Closed.






35. The magnitude and time phase of a quantity - represented by a plotted line.






36. Kw; One thousand watts.






37. NEMA;






38. 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.






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






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






41. One thousandth of an inch.






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






43. An arrangement of any of various conductors through which electric current can flow from a supply current.






44. The measured amount of electrical energy that represents the electrostatic forces between atomic particles. The nucleus of an atom has a positive charge (+) and the electrons have a negative charge(-).






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






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






47. 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.






48. See; 'Maximum Power Rating'.






49. See; 'Proximity Sensor'.






50. Radio Frequency Interference.