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






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






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






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






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






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






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






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






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






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






11. Electricity is described as a form of:






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






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






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






15. The distance between two successive peaks is called the






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






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






18. Tesla high- frequency current It is commonly called






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






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






21. Galvanic current






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






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






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






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






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






27. Meaning Alternating Current






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






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






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






31. 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:






32. Amp






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






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






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






36. Prevents current from overload or excessive overload of circuit






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






38. Makes up 5% of natural sunlight






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






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






41. 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






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






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