Test your basic knowledge |

Subjects : science, 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. Resistance is measured with a...






2. The combined resistance of two resistors in parallel is...






3. Define direct current...






4. Define direct current...






5. The specific gravity of the electrolyte of a fully charged battery should be...






6. Unlike poles of a magnet will...






7. What is the unit of electromotive force or electric pressure?






8. The explosive gas that is generated when a battery is charging is...






9. Storage battery charging stations must be provided with what kind of current protection?






10. You have three 12-volt batteries. How should you connect them in order to supply 36 volts?






11. Trailing cable on DC-powered mobile haulage equipment must be at least...






12. The advantage of DC over AC is that DC offers...






13. What is the total resistance of three 16-ohm resistors connected in series?






14. The longer the conductor - the greater the...






15. A triac is?






16. How must two 12-volt batteries be connected in order to increase the current capacity?






17. Which of the following is a requirement of an explosion-proof enclosure?






18. Not a requirement of an explosion-proof enclosure?






19. The minimum allowable size of trailing cable on DC-powered mobile haulage equipment is...






20. Which current flows in only one direction?






21. Voltage is measured with a...






22. The unit of measurement of resistance is?






23. Not true about electrical shocks?






24. When should water be added to a battery?






25. Current in a series circuit...






26. Which of the following stays the same in all parts of a series circuit?






27. Which of the following motors are considered to be constant or nearly constant speed?






28. What must be provided at underground battery charging stations?






29. Resistors are rated in ohms and...






30. The instrument used to check the electrolyte of a battery is a...






31. How many watts are in one horsepower?






32. What is the equivalent resistance of an 8-ohm and a 12-ohm resistor connected in parallel?






33. In a parallel circuit...






34. If the victim of an electrical shock has been burned while in contact with electricity - the first treatment you should apply - if the victim's heart and respiratory system are still functioning - is to...






35. What is Ohm's Law?






36. What should be used in treating an eye injury caused by battery acid?






37. If the cross-sectional area of a conductor is increased - its resistance will...






38. Define current...






39. Which of the following motors CANNOT be run without a load?






40. Like poles of a magnet will...






41. What is the equivalent resistance of two 16-ohm resistors connected in parallel?






42. A battery capable of producing 20 amperes steadily for 20 hours at 80 degrees Fahrenheit would have an ampere-hour rating of...






43. What is the flow of electrons in a conductor?






44. What is the total voltage of eight 12-volt batteries connected in series?






45. What is the first step in treating a chemical burn of the eye?






46. Power is measured with a...






47. You have three 9-volt batteries. How should you connect them in order to supply 27 volts?






48. What voltage would be required to force 10 amps through a 20-ohm resistor?






49. What is the hazard of pouring water into battery acid 'electrolyte'?

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50. The unit of measurement of power is...







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