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






2. Variable Frequency.






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






4. A hypothetical nuclear of a quark plus an antiproton.






5. A material used to conduct electricity or heat.






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






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






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






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






10. Symbol used for wye configuration for three phase electrical connections.






11. European environmental ratings. Similar to NEMA ratings in the USA. IP;*site has NEMA comparisons ~LINK~






12. The output that is produced when one or more inputs are present.






13. Chemical changes and energy produced by electric currents.






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






15. NFPA;






16. Pressure that is less than atmospheric pressure.






17. One thousandth of an inch.






18. The rate of transfer of energy.






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






20. The mechanism of a switch which operates the contacts.






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






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






23. The act of the opening of an electrical circuit.






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






25. Kva; One thousand volt amps.






26. Very High Frequency.






27. A meter used to measure units of volts.






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






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






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






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






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






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






34. 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.






35. 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.






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






37. 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.






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






39. A variable resistor.






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






41. The current that is gained by a transistor when it is connected in a common emitter circuit.






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






43. '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.






44. A circuit conductor that is grounded to become part of the electric circuit by design and intent.






45. 'Common Mode Voltage.' The voltage which is tolerable between signal and ground.






46. Mm; One thousandth of a meter.






47. Normally Closed.






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






49. Symbol for Mega - one million.






50. Pounds per square inch absolute. Pressure commonly in reference to vacuum.