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






2. Intensity. The commonly used symbol used to represent Amperes when used in formulas. I = Intensity = Current = Amps = Amperes.






3. Electric and magnetic force field that surrounds a moving electric charge.






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






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






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






7. The average temperature of a process.






8. ISA;






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






10. 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.






11. '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.






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






13. IEEE;






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






15. Kwh; One thousand watt-hours.






16. 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.






17. OSHA;






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






19. (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'






20. 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.






21. Electrical energy produced by the action of heat.






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






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






24. A unit of electric charge. The amount of charge conveyed in one second by one ampere.






25. 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.






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






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






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






29. 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.






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






31. UL; ~LINK~






32. Pressure that is less than atmospheric pressure.






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






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






35. A material used to conduct electricity or heat.






36. The speed or time rate of change of displacement.






37. The amount of time it takes for a device to react to an input signal.






38. Expressed in webers - it is the product of the average normal component of the magnetic intensity over a surface and the area of that surface.






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






40. ISO;






41. Electric current passing through an electrolyte which produces chemical changes in it.






42. Chemical changes and energy produced by electric currents.






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






44. A connected path to earth or to a conductive body that has a reference potential to earth.






45. A meter used to measure units of volts.






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






47. A meter used to measure electrical resistance in units of ohms.






48. One millionth of a volt.






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






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