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






2. 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






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






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






5. CSA ~LINK~






6. When there is current through a semiconductor p-n junction it is the resistance of a forward-biased junction.






7. The time based relationship between a reference and a periodic function.






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






9. '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.






10. The voltage that is applied across a semiconductor junction to permit forward current through that junction and the device. Forward voltage is also known as 'bias.'






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






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






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






14. Pounds per square inch differential. The difference in pressure between two points.






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






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






17. 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.






18. 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.






19. The maximum temperature at which a device can be safely operated.






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






21. MA; One thousandth of an amp.






22. Response to the change in the level of the input signal.






23. The opposition to electrical flow.






24. The electrical demand of a process. Load can be expressed or calculated as amps (current) - ohms (resistance) or watts (power).






25. The interaction of magnetism and electrical current.






26. 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.






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






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






29. Radio Frequency Interference.






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






31. 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






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






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






34. Normally Open.






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






36. The resistance to electrical current. Resistance is measured in ohms.






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






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






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






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






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






42. 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






43. SI; The standard metric system of units.






44. FM; ~LINK~






45. A device that transfers power or energy from one system to another - such as taking a physical quality and changing it to an electrical signal.






46. kV; One thousand volts.






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






48. Pressure that is less than atmospheric pressure.






49. Kva; One thousand volt amps.






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