Test your basic knowledge |

Basic Of Electricity 3

Subject : engineering
Instructions:
  • Answer 42 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. Metals used in electric wiring and motors are materials that are considered good electricity:






2. Visible light - the part of the electromagnetic radiation spectrum that we can see - makes up what percentage of natural sunlight ?






3. Is a unit that measures the resistance of an electric current






4. The unit that measures how much electric energy is being used in one second is a (n)






5. To avoid damage to the eyes of a client or practitioner when using light therapy treatments - the eyes should be protected with saturated cotton pads or:






6. The current that is used for facial and scalp treatments is measured in :






7. The device that prevents excessive current from passing through a circuit is a (n)






8. Ultraviolet (UV) rays are also referred to as






9. Uv rays are applied with a lamp at a distance of






10. Tesla high- frequency current It is commonly called






11. Amp






12. A switch that automatically interrupts or shuts off an electric current at the first indication of an overload is a (n)






13. The device that changes direct current to alternating current is a(n)






14. The distance between two successive peaks is called the






15. The path of electricity from the generating source through conductors and back to the original source is called a(n)






16. The unit that measures the amount of electric current is a(n)






17. Produces moist - uniform heat that can be appiled to the head or face






18. Electric wires are usually covered with a rubber substance that is used as an insulator or:






19. A thermal or heat- producing current with a high rate of oscillation that is used for scalp and facial treatments is :






20. The flow of electricity along a conductor is called a(n)






21. The process of forcing water- soluble products into the skin with the use of electric current is called :






22. Forces acidic substances into deeper tissue using galvanic current from the positive toward the negative pole






23. An important way of promoting electrical safety is the principle of:






24. The long wavelenghts that penetrate the deepest and produce the most heat are:






25. Tesla high frequency current should not be used on clients who pregnant - suffer from epilepsy or asthma - high blood pressure - sinus blockage - pacemaker or metal implants






26. Is a thermal or heat - producing current with a high rate of oscillation or vibration






27. The most commonly used modality that is a constant and direct current is:






28. Makes up 5% of natural sunlight






29. Galvanic current






30. The positive electrode of an electrotherapy device is called a (n):






31. Is a measurement of how much electric energy is being used in one second






32. Electric current that is constant - even - flowing and travels in one direction is:






33. The unit that measures the pressure or force that pushes the flow of electrons through a conductor is a (n)






34. Meaning Alternating Current






35. A rapid and interrupted current that flows in one direction then in the opposite direction is :






36. Indicates the negative or positive pole of an electric current






37. A process that forces liquids into the tissuse from the negative toward the positive pole is called:






38. Prevents current from overload or excessive overload of circuit






39. Electricity is described as a form of:






40. An applicator that is used for directing the electric current from the machine to the clients skin is called a (n)






41. Is process used to soften and emulsify grease deposits (oil) and blackheads in the hair follicles.






42. The negative electrode of an electrotherapy device is called a (n)