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 rate of transfer of energy.






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






3. A circuit element or components that allows signals of certain frequencies to pass and blocks signals of other frequencies.






4. 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






5. IEEE;






6. UL; ~LINK~






7. Pressure that is less than atmospheric pressure.






8. Ultra High Frequency






9. A variable resistor.






10. 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.






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






12. ISO;






13. The increase of the power level - current or voltage of a signal. In an amplifier it is the ratio of the output to the input signal levels.






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






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






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






17. A device used to store electrical energy in an electrostatic field until discharge.






18. 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






19. The amount of heat needed to convert one pound of water to one pound of steam. Latent heat is expressed in BTU per pound.






20. One thousandth of an inch.






21. A small current leaking from an output device in the off state caused by semiconductor characteristics.






22. A silicone semiconductor that maintains a fixed voltage in a circuit.






23. The standard unit of magnetic flux.






24. (DC); Electrical current that flows consistently in one direction only.






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






26. (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'






27. Kw; One thousand watts.






28. A device having two terminals and has a low resistance to electrical current in one direction and a high resistance in the other direction.






29. A device incorporating semiconductor material and suitable contacts capable of performing electrical functions (such as voltage - current or power amplification) with low power requirements.






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






31. Kwh; One thousand watt-hours.






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






33. Intensity. The commonly used symbol used to represent Amperes when used in formulas. I = Intensity = Current = Amps = Amperes.






34. See; 'Maximum Power Rating'.






35. Kva; One thousand volt amps.






36. 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.






37. One millionth of a meter.






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






39. Volt-ohm Meter.






40. 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.






41. A full-wave rectifier where the diodes are connected in a bridge circuit. This allows the current to the load during both the positive and negative alternating of the supply voltage.






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






43. 'Common Mode Voltage.' The voltage which is tolerable between signal and ground.






44. '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.






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






46. 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






47. Symbol used to denote transmitter.






48. The amount of energy released in a nuclear reaction. It is expressed in atomic mass units - or in million electron volts (MEV).






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






50. The interaction of magnetism and electrical current.