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






2. The first step in treating a chemical burn - such as one caused by battery acid - is to...






3. Power is measured with a...






4. Define direct current...






5. Current in a series circuit...






6. Not an electro-magnet?






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






8. How many watts are in one horsepower?






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






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






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






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






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


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






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






16. Not true about electrical shocks?






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






18. The unit of measurement of current is...






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






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






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






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






23. Like poles of a magnet will...






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






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






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






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






28. Unlike poles of a magnet will...






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






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






31. The longer the conductor - the greater the...






32. A triac is?






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






34. Resistors are rated in ohms and...






35. Batteries connected in parallel provide...






36. Define current...






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






38. Define resistance...






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






40. Voltage in a parallel circuit...






41. Resistance is measured with a...






42. The best insulator against the lines of magnetic force is...






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






44. The unit of measurement of power is...






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






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






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






48. How long should treatment for shock be continued?






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






50. 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...