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






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






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






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






5. See; 'Proximity Sensor'.






6. EPA; ~LINK~






7. Silicone Controlled Rectifier.






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






9. IBEW;






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






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






12. kV; One thousand volts.






13. Kva; One thousand volt amps.






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






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






16. Chemical changes and energy produced by electric currents.






17. 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.






18. IEC;






19. A meter used to measure electrical resistance in units of ohms.






20. 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.






21. The standard unit of magnetic flux.






22. SI; The standard metric system of units.






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






24. The range of temperature over which a device may be safely used. The temperature range which the device has been designed to operate.






25. Normally Open.






26. In a three phase connection all three phases are connected in series thus forming a closed circuit.






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






28. Response to the change in the level of the input signal.






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






30. NFPA;






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






32. MA; One thousandth of an amp.






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






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






35. Kw; One thousand watts.






36. A device that converts AC voltage to pulsating DC voltage.






37. Very High Frequency.






38. The act of the opening of an electrical circuit.






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






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






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






42. One thousandth of an inch.






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






44. A solid-state switching device for semiconductors to convert AC current in one of two directions controlled by an electrode.






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






46. 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.






47. Mm; One thousandth of a meter.






48. NEC: A set of regulations pertaining to electrical installation and design in the interest of the protection of life and property. The NEC is adopted by NFPA and approved by ANSI. It is the preferred standard of guidelines used by most electrical reg






49. UL; ~LINK~






50. The average temperature of a process.