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. 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.






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






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






4. An anode (+) or cathode (-) conductor on a device through which an electric current passes.






5. ISA;






6. 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.






7. A Solid State relay is a switching device that completes or interrupts a circuit electrically and has no moving parts. A Mechanical relay is an electromechanical device that closes contacts to complete a circuit or opens contacts to interrupt a circu






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






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






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






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






12. (ampere)The basic unit of current in an electrical circuit. One ampere is the rate of flow of electric current when one coulomb of charge flows past a point in the circuit in one second. Symbolically characterized by the letter 'I' and sometimes 'A'






13. A full path of electrical current from a voltage source that passes completely from one terminal of the voltage source to another.






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






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






16. Non-conducting material used to isolate and/or insulate energized electrical components.






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






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






19. 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






20. ANSI;






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






22. The standard unit of magnetic flux.






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






24. Ultra High Frequency






25. MA; One thousandth of an amp.






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






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






28. One millionth of an amp.






29. A three terminal semiconductor device. In a 'FET' the current is from source to drain because a conducting channel is formed by a voltage field between the gate and the source.






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






31. The unit of power. One watt equals one joule per second - 1/746th horsepower.






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






33. 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.






34. 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.






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






36. kV; One thousand volts.






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






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






39. Kw; One thousand watts.






40. Silicone Controlled Rectifier.






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






42. One millionth of a meter.






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






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






46. The energy delivered by a circuit or device. The electrical signal produced by the input to the transducer.






47. 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.






48. Resistance Temperature Detector.






49. 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.






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