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. Inspection - analysis and action required to ensure quality of output.






2. The rate of transfer of energy.






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






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






5. Radio Frequency Interference.






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






7. ISA;






8. 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






9. The mechanism of a switch which operates the contacts.






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






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






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






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






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






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






16. One millionth of a volt.






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






18. 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.






19. 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






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






21. ISO;






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






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






24. (AC); Electrical current that changes (or alternates) in magnitude and direction of the current at regular intervals.






25. IEEE;






26. Normally Closed.






27. NFPA;






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






29. The standard unit of magnetic flux.






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






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






32. 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.






33. A variable resistor.






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






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






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






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






38. See; 'Proximity Sensor'.






39. 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.






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






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






42. Normally Open.






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. Or Hertz; The measurement of the time period of one alternating electric current. In the United States this is commonly 60 cycles per second - or 60 Hertz.






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






46. 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.






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






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






49. A variable resistor.






50. The part of a circuit that supplies power to the entire circuit or part of the circuit. Usually a separate unit that supplies power to a specific part of the circuit in a system.