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. A variable resistor.






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






3. The range of temperature over which a device may be safely used. The temperature range which the device has been designed to operate.






4. Symbol for Mega - one million.






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






6. 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.






7. Mm; One thousandth of a meter.






8. A switching device used in switching high DC loads. It contains a small permanent magnet which deflects arc in order to quench it.






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






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






11. Ultra High Frequency






12. The range of voltage needed to maintain operation of a control or device.






13. In a three phase connection all three phases are connected in series thus forming a closed circuit.






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






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






16. ISO;






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






18. Volt-ohm Meter.






19. (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'






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






21. Variable Frequency.






22. One thousandth of an inch.






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






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






25. One millionth of an amp.






26. A variable resistor.






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






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






29. A device that converts AC voltage to pulsating DC voltage.






30. 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.






31. Normally Open.






32. 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(-).






33. 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.






34. NEMA;






35. Kw; One thousand watts.






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






37. 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






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






39. A unit of electric charge. The amount of charge conveyed in one second by one ampere.






40. 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.






41. The interaction of magnetism and electrical current.






42. The average temperature of a process.






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






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. The pronounced curvature in reverse voltage current that is characteristic of a diode.






46. ISA;






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






48. An interconnected arrangement of parts for carrying high-voltage electricity.






49. 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.






50. 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