Chapter 12 Engineering Fundamentals:
An Introduction to Engineering
1. Electric current is a fundamental dimension.
a. True
b. False
2. Which subatomic particle has a negative charge?
a. Proton
b. Neutron
c. Electron
d. Ion
Analysis:
3. Which subatomic particle has a positive charge?
a. Proton
b. Neutron
c. Electron
d. Ion
Analysis:
4. Which subatomic particle has no charge?
a. Proton
b. Neutron
c. Electron
d. Ion
Engineering Fundamentals, 5th ed. Chapter 12
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Analysis:
5. Opposite charges repel each other and like charges attract each other.
a. True
b. False
6. The SI unit for electric current is
a. amperes.
b. electrons per second.
c. coulombs.
d. Watts
Analysis:
7. The amount of work required to move charge between two points is represented by
a. electric current.
b. resistance.
c. voltage.
d. energy.
Analysis:
8. Voltage is sometime referred to as emf. What does emf stand for?
a. Electromagnetic frequency
b. Electromotive frequency
c. Electromagnetic force
d. Electromotive force
Analysis:
9. In all batteries, electricity is produced by
a. light.
b. heat.
c. a chemical reaction.
d. all of the above.
10. Primary cells are batteries that can be recharged while secondary cells are batteries that
cannot be recharged.
a. True
b. False
11. Which of the following batteries is an example of a primary cell?
a. Nickel-cadmium (NiCd) also known as “nicad”
b. Nickel-metal hydride (NiMH)
Engineering Fundamentals, 5th ed. Chapter 12
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c. Alkaline
d. Lead acid
Analysis:
12. In general, there are two ways in which the sun’s energy is converted into electricity:
a. photovoltaic and photothermal.
b. photovoltaic and photochemical.
c. photovoltaic and photosynthetic.
d. none of the above
13. The flow of electric charge that occurs in one direction that is typically produced by batteries
is known as
a. ac current.
b. dc current.
c. ac/dc current.
d. unidirectional current.
Analysis:
Engineering Fundamentals, 5th ed. Chapter 12
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14. The flow of electric charge that periodically reverses direction that is typically produced by
rotating generators is known as
a. ac current.
b. dc current.
c. ac/dc current.
d. omni directional current.
Analysis:
15. The law that states that at any given time, the sum of the currents entering a node must equal
the sum of the currents leaving the node is known as
a. Kirchoff’s current law.
b. Kirchoff’s voltage law.
c. Ohm’s law.
d. Coulomb’s law.
Analysis:
16. The electrical resistance of a material varies with temperature.
a. True
b. False
17. Some materials exhibit near-zero resistance at very low temperatures. This behavior is called
a. infra-resistance.
b. anti-resistance.
Engineering Fundamentals, 5th ed. Chapter 12
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c. semiconductivity.
d. superconductivity.
Analysis:
18. Ohm’s law describes the relationship between voltage, resistance, and current. Which of
these is Ohm’s law?
a.
I
R
V
b.
R
I
V
c.
IRV
d.
VIR
Analysis:
19. A numbering system that describes the size of an electric conductor is AWG. What does
AWG stand for?
a. American Wire Gage
b. Association of Wire Gages
c. Atlas of Wire Gages
d. All Wires are Good
Analysis:
Engineering Fundamentals, 5th ed. Chapter 12
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20. If No. 26 wire has a diameter of approximately 0.016 centimeters, what is the diameter of
No. 20 in centimeters?
a. 0.010 centimeters
b. 0.020 centimeters
c. 0.022 centimeters
d. 0.032 centimeters
Analysis:
21. When it comes to wire size, the larger the gage number, the larger the wire diameter.
a. True
b. False
22. Electrical resistance is a fundamental dimension.
a. True
b. False
23. In certain circuits, if one of the elements fails, that failure prevents the current from flowing
through other elements in the circuit; thus, the entire circuit fails. This type of circuit is a
a. parallel circuit.
b. series circuit.
c. none of the above
Engineering Fundamentals, 5th ed. Chapter 12
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Analysis:
24. Electrical components that store energy on two oppositely charged electrodes, rather than
through a chemical reaction, are known as
a. batteries.
b. inductors.
c. transistors.
d. capacitors.
Analysis:
25. Capacitors are used for
a. energy storage.
b. electronic filters.
c. timing elements.
d. all of the above
Analysis:
26. The distribution of light on a horizontal surface is known as
a. luminescence.
b. luminosity.
c. illuminescence.
Engineering Fundamentals, 5th ed. Chapter 12
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d. illumination.
Analysis:
27. A common unit of illumination intensity is called a footcandle and is equal to
a. the amount of light one foot away from a candle.
b. the amount of light from a one-foot long candle.
c. one lumen distributed over an area of 1-square-foot.
d. none of the above
Analysis:
28. The ratio of how much light is produced by a lamp (in lumens) to how much energy is
consumed by the lamp (in Watts) is known as
a. efficacy.
b. efficiency.
c. illumination cost.
d. energy cost.
29. In lighting design, a variable called CRI is often used. What does CRI stand for?
Engineering Fundamentals, 5th ed. Chapter 12
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b. Color Rendition Index
c. Capacitive-Resistive Index
d. none of the above
Analysis: