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






2. Resistors are rated in ohms and...






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






4. The longer the conductor - the greater the...






5. Define direct current...






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






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






8. Like poles of a magnet will...






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






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






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






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






13. What is Ohm's Law?






14. In a parallel circuit...






15. Not an electro-magnet?






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






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






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






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






20. A triac is?






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






22. Batteries connected in parallel provide...






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






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






25. Voltage is measured with a...






26. The unit of measurement of resistance is?






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






28. Not true about electrical shocks?






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






30. Current in a series circuit...






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






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






33. The unit of measurement of power is...






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






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






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






37. Power is measured with a...






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






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






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






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






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






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






44. When should water be added to a battery?






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






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






47. Unlike poles of a magnet will...






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






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






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






Can you answer 50 questions in 15 minutes?



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