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 maximum temperature at which a device can be safely operated.






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






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






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






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






6. To close an electrical circuit. To establish an electrical circuit through the closing of a contact - switch or other related device.






7. See; 'Proximity Sensor'.






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






9. European environmental ratings. Similar to NEMA ratings in the USA. IP;*site has NEMA comparisons ~LINK~






10. A fluctuation in the intensity of a steady current.






11. 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






12. The unit for capacitance. A capacitor that stored one coulomb of charge with one volt across it will have a value of one farad.






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






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






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






16. The element inside a vacuum tube - incandescent lamp or other similar device.






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






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






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






20. 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.






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






22. 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.






23. 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.






24. Volt-ohm Meter.






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






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






27. Kw; One thousand watts.






28. 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.






29. -459.67






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






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






32. Applying molecular physics to electronics.






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






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






35. kV; One thousand volts.






36. One thousandth of an inch.






37. Radio Frequency Interference.






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






39. Symbol used to denote transformer.






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






41. The moving of electricity or heat through a conductor.






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






43. 'British Thermal Unit' - the amount of thermal energy required to raise one pound of water 1degree F. One BTU is equal to .293 watt hours. One kWh is equal to 3412 BTUs.






44. IEC;






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






46. The opposition to electrical flow.






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






48. A meter used to measure units of volts.






49. 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.






50. SI; The standard metric system of units.