Test your basic knowledge |

Basic Electricity

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. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?






2. To what measurement do the conductor mills refer?






3. What is a characteristic of insulators?






4. What do electrical charges need to cause a fire or explosion?






5. When does a DC circuit oppose current flow?






6. In most applications - what remains constant if the current remains constant and flows in one direction?






7. How do static charges distribute themselves?






8. What does a third band of brown mean?






9. What is the unit of measurement of electrical current?






10. What is the purpose of capacitors in electrical circuits?






11. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?






12. What does a moving charge produce?






13. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?






14. When reading resistance color codes - what does the fourth band indicate?






15. What is a way to classify wires and cables?






16. What is a common measure of wire diameter?






17. Which of the following materials is NOT a good conductor?






18. What is a switch that operates by electricity?






19. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?






20. What is the unit of measurement of potential difference?






21. What is the purpose of a raceway?






22. What do we call the ability to do work?






23. Which material has the lowest resistance at ordinary temperatures?






24. Why is the transformer important to AC electricity?

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25. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.






26. What is the difference between AC and DC?






27. What is voltage?






28. What is the use of the electromagnet?






29. What is a common form used in conductors?






30. What is true about a dry cell?






31. What makes electrons flow?






32. Where does the thumb point in both Left-Hand Rules?






33. What does an object have if a magnetic field acts on it?






34. What is the name for electrical resistance of insulation?






35. What is a rigid metal conduit?






36. The generator is what method of creating potential energy?






37. What determines whether a spark can be produced?






38. What must be large enough to carry the largest current likely to occur?






39. What is a wire classification?






40. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?






41. Which of the following is a type of resistor?






42. What do junction boxes protect?






43. What is the fundamental property of insulators?






44. Given R=E / I and the following information - plug in the data and solve the problem for resistance. 1.5 volt walkman battery - 0.02 amps of current






45. What is 'difference in potential(potential difference) - per unit of charge - between two points'?






46. The thermocouple uses which method for creating potential energy?






47. What type of circuit has one path of follow through a load?






48. What is another name for an inductor?






49. What is the relationship between magnetism and electricity?






50. What is the purpose of resistors in electrical circuits?