Copyright Goodheart-Willcox Co., Inc.
Copyright Goodheart-Willcox Co., Inc.
248 Engineering Fundamentals
6. Most electricity is produced using electric
_______.
A. motors
B. electrolytes
C. cells
D. generators
7. A battery is an example of which source of
electricity?
A. Chemical action.
B. Magnetism.
C. Wind farms.
D. Solar cells.
8. Electromotive force is another term for
_______.
9. _______ are the unit of measure for electrons.
10. When _______ is constant, current fl ows in
only one direction.
11. Which of the following is not an example of
a good conductor?
A. Copper.
B. Aluminum.
C. Rubber.
D. Gold.
12. In a circuit where voltage is held constant, if
resistance increases, current _______.
13. The unit for power is the _______.
A. ohm
B. amp
C. watt
D. coulomb
14. _______ is the relationship between
resistance, current, and voltage in electrical
circuits.
15. A _______ circuit has only one path for
current fl ow.
A. parallel
B. series
C. series-parallel
D. wave
16. Find the voltage for a series circuit where
you know the current is 0.5 A and the
resistance is 25 Ω.
17. What is the total current fl ow in this
circuit?
18. Which of the following is not an example of
a good insulator?
A. Plastic.
B. Paper.
C. Steel.
D. Rubber.
19. A resistor with a color code of green-yellow-
red-gold has a value of _______ Ω with a
tolerance of _______%.
20. A(n) _______ allows fl ow in only one
direction and can be used as a rectifi er to
change ac to dc.
21. _______ is the most commonly used
semiconductor material.
22. Name the two types of control systems.
23. Incandescent bulbs use a _______ fi lament
inside a globe where the oxygen has been
removed.
A. silicon
B. carbon
C. tungsten
D. fl uorescent
24. _______ use about 75% less energy to create
the same amount of light as an incandescent
bulb.
25. What are PCBs and what are they used for?
26. A(n) _______ can test for resistance and
continuity.
A. voltmeter
B. ohmmeter
C. ammeter
D. oscilloscope