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






2. The longer the conductor - the greater the...






3. What voltage is required to force 5 amps through a 15-ohm resistor?






4. Current is measured with a (an)...






5. A triac is?






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






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






8. What is the rate that work is done or heat is dissipated?






9. 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...






10. How many watts are in one horsepower?






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






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






13. The armature of a direct current motor - when running - generates...






14. How long should treatment for shock be continued?






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






16. The core of an electro-magnet should be made of...






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






18. Not true about electrical shocks?






19. Batteries connected in parallel provide...






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






21. Like poles of a magnet will...






22. Resistance is measured with a...






23. What is the total voltage of four 9-volt batteries connected in a series?






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






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






26. What is the opposition to flow of electric current?






27. The dangerously explosive gas emitted by charging a lead-acid storage battery is...






28. What is the total resistance of four 25-ohm resistors connected in series?






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






30. When should water be added to a battery?






31. What is the equivalent resistance of two 8-ohm resistors connected in parallel?






32. The unit of measurement of resistance is?






33. How many kilowatts are used to develop 50 horsepower?






34. What voltage would be required to force 10 amps through a 50-ohm resistor?






35. Current in a series circuit...






36. Define current...






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






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






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






40. Which current flows in only one direction?






41. What is the total voltage of two 6-volt batteries connected in parallel?






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






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






44. Power is measured with a...






45. Not an electro-magnet?






46. What is the total resistance of four 15-ohm resistors connected in series?






47. The most common reason that solid state devices fail is...






48. Chemical burns caused by battery acid should be washed with clean water for at least...






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






50. Voltage is measured with a...