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






2. 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.






3. In a temperature controller it is the output form that provides a current proportional to the amount of control that is required. Commonly it is the 4 to 20 milliamp current proportioning band that is used in the electronics industry.






4. 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(-).






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






6. FM; ~LINK~






7. The difference in potential measured between two points caused by resistance or impedance.






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






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






10. Kw; One thousand watts.






11. The form of radiation used to make non-contact temperature measurements. In the electromagnetic spectrum it is the area beyond red light from 760 nanometers to 1000 microns.






12. 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.






13. Symbol used to denote transmitter.






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






15. Two dissimilar metals connected at a point - that produce an electrical current whose magnitude is dependent upon the temperature at the junction point.






16. IEC;






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






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






19. A form of silicone dioxide. Commonly used in the making of radio transmitters and heat resistant products.






20. 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.






21. IEEE;






22. Pounds per square inch gage. Pressure in relationship to the ambient air pressure>






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






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






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






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






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






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






29. A controller whose action is either fully on or off.






30. Normally Closed.






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






32. 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.






33. An electrical resistor composed of semiconductor material - whose resistance is a known rapidly varying function of temperature.






34. 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






35. The rate at which electricity flows - measured in amperes - 1 ampere = 1 coulomb per second.






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






37. An electrical circuit that increases the power - voltage or current of an applied signal.






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






39. 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.






40. The standard unit of magnetic flux.






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






42. 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.






43. Applying molecular physics to electronics.






44. One millionth of an amp.






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






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






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. The standard that is used to make comparison measurements or calibrations.






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






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