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. EPA; ~LINK~






2. 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(-).






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






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






5. UL; ~LINK~






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






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






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






9. Applying molecular physics to electronics.






10. A tube - pipe or trough that carries and protects electric wiring.






11. ISA;






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






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






14. A switch with contacts that are made with actuating force and released when that force is removed.






15. A meter used to measure units of volts.






16. The method by which two devices or systems are connected and interact with each other.






17. A device - instrument or component that will not produce any spark or thermal effects under any conditions that are normal or abnormal that will ignite a specified gas mixture. Electrical and thermal energy limits are at levels incapable of causing i






18. IEC;






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






20. Variable Frequency.






21. Volt-ohm Meter.






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






23. -459.67






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






25. 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.






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






27. Mm; One thousandth of a meter.






28. OSHA;






29. 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.






30. 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.






31. A variable resistor.






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






33. A solid-state switching device used in switching AC wave forms.






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






35. The element inside a vacuum tube - incandescent lamp or other similar device.






36. See; 'Maximum Power Rating'.






37. The rate of transfer of energy.






38. One millionth of an amp.






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






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






41. The average temperature of a process.






42. The moving of electricity or heat through a conductor.






43. Commonly used in generators and motors - it is an electromagnet formed from a coil of insulated wire that is wound around a soft iron core.






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






45. The basic of thermal energy. The work done by the force of one newton acting through a distance of one meter.






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. A hypothetical nuclear of a quark plus an antiproton.






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






49. An area in which combustible or flammable mixtures are or could be present.






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