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. Output power divided by input power - (work performed in ratio to energy used to produce it).






2. -459.67






3. A variable resistor.






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






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






6. MLS; A photoelectric control that operates on pulsed infrared radiation at a specific frequency - and responds only to that frequency of pulse. MLS is used frequently in areas where ambient light may cause problems with other types of sensors.






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






8. Resistance Temperature Detector.






9. Inspection - analysis and action required to ensure quality of output.






10. Symbol for Mega - one million.






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






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






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






14. 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(-).






15. EPA; ~LINK~






16. 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.






17. Applying molecular physics to electronics.






18. (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'






19. A solid-state switching device for semiconductors to convert AC current in one of two directions controlled by an electrode.






20. A meter used to measure units of volts.






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






22. A positive (+) electrode. The point where electrons exit from a device to the external electric circuit.






23. Volt-ohm Meter.






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






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






26. 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.






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






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






29. FM; ~LINK~






30. A switch in a controller that manually resets after exceeding the controllers limit.






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






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






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






34. A circuit which may have one or many resistors and/or other various devices connected in a series so that the current has only one path to follow.






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






36. Very High Frequency.






37. UL; ~LINK~






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






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






40. Variable Frequency.






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






42. 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.






43. The rapid on/off cycling of a relay caused by improper signal or adjustment - faulty contacts - or other malfunction.






44. 'American Wire Gauge' system used to determine wire size.






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






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






47. (AC); Electrical current that changes (or alternates) in magnitude and direction of the current at regular intervals.






48. OSHA;






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






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