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. 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.






2. The opposition to electrical flow.






3. One millionth of a volt.






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






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






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






7. One of the very small discrete packets into which many forms of energy are subdivided.






8. A variable resistor.






9. 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






10. One millionth of an amp.






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






12. Also known as Hertz - it is the number of complete cycles of periodic waveform that occur during a time period of one second.






13. Ultra High Frequency






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






15. The behavior of charged particles and the steady motion of charge in magnetic and electric fields.






16. A material used to conduct electricity or heat.






17. A connected path to earth or to a conductive body that has a reference potential to earth.






18. An electrically conductive fused salt or a solution where the charge is carried by ionic movement.






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






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






21. The interaction of magnetism and electrical current.






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






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






24. 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.






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






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






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






28. Normally Closed.






29. ISO;






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






31. The average temperature of a process.






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






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






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






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






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






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






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






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






40. A unit of electrical current named after French physicist Andr






41. The maximum watts that a device can safely handle.






42. 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.






43. Variable Frequency.






44. The rate of transfer of energy.






45. 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.






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






47. '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.






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






49. A negative (-) electrode. The point of entry of electrons into a device from an external circuit. The negative electrode of a semiconductor diode.






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