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






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






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






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






5. Electricity is described as a form of:






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






7. The distance between two successive peaks is called the






8. Metals used in electric wiring and motors are materials that are considered good electricity:






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






10. Galvanic current






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






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






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






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






15. Makes up 5% of natural sunlight






16. Meaning Alternating Current






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






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






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






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






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






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






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






24. Prevents current from overload or excessive overload of circuit






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






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






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






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






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






30. Amp






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






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






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






34. 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:






35. 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






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






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






38. Tesla high- frequency current It is commonly called






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






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






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






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