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. What is the purpose of capacitors in electrical circuits?






2. When reading resistance color codes - what does the first band indicate?






3. Identify the general blueprint symbol for inductors.






4. What is an electromagnet?






5. A resistor is color coded brown - green - orange. What is its resistance?






6. What is the difference between AC and DC?






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






8. What is the relationship of conductor size and length to resistance?






9. Why is the transformer important to AC electricity?

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10. Where do the fingers point in both Left-Hand Rules?






11. What is resistance?






12. What is voltage?






13. What results when current is run through a material with high resistance?






14. What is an arrangement of materials that create a potential difference by chemistry?






15. What makes electrons flow?






16. What is a wire classification?






17. Identify the blueprint symbol for resistors.






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






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 are the names of two of the six primary methods of producing a voltage?






21. What is a switch that operates by electricity?






22. What determines whether a spark can be produced?






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






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






25. What is the term for two or more cells attached together?






26. What are the common units of measurement for round and square conductor cross - sections?






27. How do static charges distribute themselves?






28. What does Ohm's Law represent?






29. What is a characteristic of insulators?






30. What does resistance produce?






31. What does static electricity do?






32. 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






33. What is a DC circuit characteristic?






34. What is a conductor?






35. What is a common cause of static electricity in a shop?






36. What makes electrons flow?






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






38. Given E=I X R and the following information - plug in the data and solve the problem for voltage. 0.015 ohms - 800 amps of current






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






40. What can permanently break down a capacitor?






41. Which way is the current going in the circuit shown?(electron flow)






42. What determines the resistance of a resistor?






43. What is power?






44. What is the unit of measurement of resistance?






45. What does a moving charge produce?






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






47. What types of protective tapes are used?






48. What is the type of cable composed of many fine wires?






49. What is the basic law of magnetic force?






50. What does a third band of brown mean?