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Class:
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1. Which of the following is true of an electron?
a.
It has a positive charge
b.
It has a negative charge
c.
It is part of the nucleus of an atom
d.
It has more mass than a proton
2. The conventional theory of electrical current flow states that current flows:
a.
From positive to negative
b.
From negative to positive
c.
From low potential to high potential
3. Which of the following substances would have the least ability to conduct electricity?
a.
Gold
b.
Copper
c.
Aluminum
d.
Rubber
4. Which theory of electrical current flow states that current flows from a negative location to a positive location in an
electrical circuit?
a.
Kilowatt’s law
b.
Electron theory
c.
Conventional theory
d.
Ohm’s law
5. What type of signal is produced by an inductive pulse generator?
a.
Saw-tooth
b.
Square-wave
c.
AC Sinewave
d.
Rippled DC
6. How should an Ohmmeter be connected into an electrical circuit?
a.
In series with the circuit energized
b.
In parallel with the circuit energized
c.
In series with the circuit open
d.
In parallel with the circuit open
7. An element’s atomic number is used to identify the differences between specific elements. What determines the atomic
number of an element?
a.
Number of protons in the nucleus
b.
Number of electrons
c.
Sum of the neutrons and protons
d.
None of the above
8. What determines the chemical properties of the elements?
a.
How the shells are populated with electrons
b.
The total number of electrons
c.
The number of electrons in the valence shell
d.
None of the above
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9. Which of the following statements best describes the properties of an inert element?
a.
Unlikely to participate in a chemical reaction
b.
Have a fully populated valence shell
c.
Both A and B
d.
Neither A nor B
10. What is an ion?
a.
An electrically unbalanced element
b.
An element that has a surplus or deficit of electrons
c.
Both A and B
d.
Neither A nor B
11. When two or more atoms are chemically bonded, what is formed?
a.
A molecule
b.
A neutron
c.
A proton
d.
An ion
12. Technician A says that all electrons are alike regardless of the atomic element? Technician B says that all protons are
alike regardless of the atomic element? Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
13. What is the term used to describe an element with fewer than 4 electrons in its outer shell?
a.
Insulator
b.
Conductor
c.
Semiconductor
d.
Could be any of the above
b
14. How many electrons are in the outer shell of a semiconductor?
a.
2
b.
4
c.
8
d.
16
b
15. What are the factors that determine the electrical resistance of a length of copper wire?
a.
Overall length of the wire
b.
Temperature of the wire
c.
Sectional area of the wire
d.
All of the above
d
16. Which of these wire gauge sizes has the largest diameter?
a.
18 gauge
b.
16 gauge
c.
12 gauge
d.
8 gauge
d
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17. Vehicle wiring schematics use which theory of current flow almost exclusively?
a.
Conventional theory
b.
Electron theory
c.
Gilbert theory
d.
Faraday theory
18. Which of these terms mean the same thing as Voltage?
a.
Charge differential
b.
Electromotive force
c.
Potential difference
d.
All of the above
d
19. All of these descriptions describing the behavior of magnetic lines of flux are true EXCEPT for:
a.
Flux lines flow in one direction
b.
Flux density is greatest at the poles of a magnet
c.
Flux lines facing the same direction repel
d.
Flux density determines the magnetic force
20. As the electrons of an atom orbit it nucleus, what prevents them from colliding?
a.
They are moving at the speed of light
b.
They have like charges, so they repel each other
c.
They never leave their orbits
d.
They are too small to hit anything
b
21. Which of the following electromagnets would produce the greatest magnetomotive force?
a.
A coil of wire with 1,000 turns and 10 amperes of current
b.
10,000 ampere-turns wrapped around an iron core
c.
100 turns of wire flowing 50 amps of current
d.
1 amp of current through 5,000 turns of wire
b
22. Which of the following devices does NOT rely upon the principles of electromagnetism to function?
a.
Solenoid
b.
Headlight
c.
Relay
d.
Ignition coil
b
23. Which of the following circuits has only one path for current to flow?
a.
Parallel
b.
Series
c.
Series-parallel
d.
None of the above
b
24. In which of the following circuits would current flow be the same at any point in the circuit when it is energized?
a.
Series
b.
Series-parallel
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c.
Parallel
d.
None of the above
25. If an additional current path to ground is added to a series circuit, what type of circuit has been created?
a.
Series
b.
Series-parallel
c.
Parallel
d.
None of the above
26. Which type of circuit has multiple paths for current flow?
a.
Series
b.
Series-parallel
c.
Parallel
d.
Both B and C
d
27. Which of the following circuit faults will NOT result in overheating the circuit?
a.
Short circuit
b.
Open circuit
c.
Short to ground
d.
High resistance
b
28. Which of the following is NOT a true expression of Ohm’s law?
a.
E = I × R
b.
Volts = Amps × Ohms
c.
I = E/R
d.
Amps = Ohms/Volts
d
29. How many volts are required to push 3 amps through a resistance of 4 ohms?
a.
1 volt
b.
12 volts
c.
7 volts
d.
1 1/4 volts
b
30. A series circuit has a 12-volt power source and two resistors of 1 ohm and 2 ohms respectively. How many amps will
flow when the circuit is closed?
a.
4 amps
b.
3 amps
c.
6 amps
d.
15 amps
31. What is the voltage drop across a 2-ohm resistor used in a 12-volt series circuit that is flowing 1.5 amps?
a.
3 volts
b.
9 volts
c.
12 volts
d.
1.5 volts
32. An electrical component that can store a charge differential is known as a:
a.
Capacitor
b.
Inductor
c.
Transformer
d.
Relay
33. Which of the following functions can be performed by capacitors in vehicle electrical circuits?
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Class:
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a.
Power supply filter
b.
Spike suppression
c.
Reshaping wave forms
d.
All of the above
d
34. Which of the following components uses a step-up transformer?
a.
Ignition coil
b.
Relay
c.
Ignition switch
d.
All of the above
35. If an additional current path is added to a parallel circuit what must happen to total circuit resistance?
a.
Decreases
b.
Increases
c.
Remains the same
d.
No current flow
36. If you rub a balloon on a wool sweater, which of the following will result?
a.
Balloon acquires a positive charge
b.
Balloon acquires a negative charge
c.
Balloon bursts
d.
Balloon becomes electrically neutral
b
37. Technician A says that after a balloon is rubbed on a wool sweater, it should stick to a wall. Technician B says that if
two balloons are rubbed on a wool sweater, they should stick to each other? Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
38. What is the reason for using braided copper wire in vehicle electrical circuits rather than solid copper wire?
a.
Conducts more current
b.
Greater flexibility
c.
More resistant to corrosion
d.
Conducts at lower temperatures
b
39. If a terminal has a deficit of electrons, it would be known as a:
a.
cathode
b.
anode
c.
electrode
d.
neutral post
b
40. Technician A says that a cathode has an excess of electrons. Technician B says when a cathode is connected to an
anode by a conductor, electrons will flow from the cathode to the anode. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
41. What is used to separate the two conductors in a capacitor?
a.
magnetic field
b.
rubber insulator
c.
dielectric
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d.
nothing, they must contact each other
42. Technician A says that the charge differential stored in a capacitor is held until its plates are connected to a lower
voltage source. Technician B says that over time, stored electrons on a capacitor plate will leak through the dielectric until
both plates have an equal charge. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
43. What is capacitance measured in?
a.
volts
b.
amps
c.
coulombs
d.
farads
d
44. A commonly used sensor that induces an AC voltage by having a rotating reluctor cut through a permanent magnetic
field is used for:
a.
wheel speed sensors
b.
transmission tailshaft speed sensors
c.
engine speed sensors
d.
all of the above
d
45. Which of the following devices works on an opposite principle to an electric motor?
a.
diode
b.
generator
c.
transformer
d.
capacitor
b
46. What is visible light, such as that radiated by a light bulb, known as?
a.
protons
b.
photons
c.
electrons
d.
neutrons
b
47. Calculate the power consumed by a 2 amp lightbulb in a 12-volt circuit.
a.
12 W
b.
18 W
c.
24 W
d.
48 W
48. Calculate the electrical pressure required to flow 6 amps through a 2 ohm resistance
a.
3 volts
b.
.33 volts
c.
6 volts
d.
12 volts
d
49. When a dead short occurs, what happens to circuit resistance?
a.
Increases to a dangerous level
b.
Significantly reduced
c.
Not affected
d.
Increases a small amount
b
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50. The sum of all the voltage drops in an electrical circuit should be:
a.
equal to source voltage
b.
equivalent to zero voltage
c.
equal to the resistance in the circuit
d.
equivalent to the amperage
51. INSERT FIGURE 5-29 FROM TEXTBOOK IMMEDIATELY ABOVE THIS QUESTION. Referencing the above
figure, use Ohm’s Law to calculate current flow. Which of the following is correct?
a.
12 amps
b.
4 amps
c.
3 amps
d.
3 ohms
52. INSERT FIGURE 5-30 FROM TEXTBOOK IMMEDIATELY ABOVE THIS QUESTION. Referencing the above
figure, use Ohm’s Law to calculate total circuit resistance. Which of the following is correct?
a.
1.5 ohms
b.
3 ohms
c.
4 ohms
d.
8 ohms
53. INSERT FIGURE 5-30 FROM TEXTBOOK IMMEDIATELY ABOVE THIS QUESTION. Referencing the above
figure, use Ohm’s Law to calculate current flow. Which of the following is correct?
a.
2 amps
b.
4 amps
c.
8 amps
d.
12 amps
54. INSERT FIGURE 5-31 FROM TEXTBOOK IMMEDIATELY ABOVE THIS QUESTION. Referencing the above
figure, calculate the voltage drop across the 2 ohm resistor. Which of the following is correct?
a.
1.5 volts
b.
3 volts
c.
9 volts
d.
12 volts
55. INSERT FIGURE 5-31 FROM TEXTBOOK IMMEDIATELY ABOVE THIS QUESTION. Referencing the above
figure, calculate the voltage drop across the 6 ohm resistor. Which of the following is correct?
a.
1.5 volts
b.
3 volts
c.
9 volts
d.
12 volts
56. INSERT FIGURE 5-31 FROM TEXTBOOK IMMEDIATELY ABOVE THIS QUESTION. Referencing the above
figure, calculate the voltage drop across the complete series circuit. Which of the following is correct?
a.
1.5 volts
b.
3 volts
c.
9 volts
d.
12 volts