Automotive Electrical and Electronic Systems Classroom Manual Fifth Edition Update by John F. Kershaw

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Electrical Diagrams and Wiring 127
c. Fusible link
d. Circuit breaker
14. What usually causes a fuse to “blow”?
a. Too much voltage
b. Too much current
c. Too little voltage
d. Too little resistance
15. Fuses are rated by __________ capacity.
a. Current
b. Voltage
c. Resistance
d. Power
16. Which of the following is true of circuit
breakers?
a. Made of a single metal strip
b. Must be replaced after excess current
flow
c. Less expensive than fuses are
d. Used for frequent temporary overloads
17. This symbol represents which of these items:
c. Installation diagram
d. Alternator circuit diagram
20. Automobile manufacturers color-code the
wires in the electrical system to:
a. Help trace a circuit
b. Identify wire gauge
c. Speed the manufacturing process
d. Identify replacement parts
21. A wire in a Valley Forge (system) diagram is
identified as .8 PUR/623 which of the
following:
a. 8-gauge wire, power plant, circuit
number 623
b. 8-gauge wire, purple, vehicle
model 623
c. 0.8-mm wire, purple, circuit number 623
d. 0.8 points per length, vehicle model 623
22. Which of the following electrical symbols
indicates a lamp?
a.
b.
a. Circuit breaker
b. Variable resistor
c. Capacitor
d. Solenoid
18. The following two symbols represent which
two devices?
c.
d.
a. Zener diode and a PNP transistor
b. Zener diode and a NPN transistor
c. One-way diode and a PNP transistor
d. One-way diode and a NPN transistor
19. The electrical diagram that shows where the
wires and loads are physically located on
the vehicle is the:
a. Schematic diagram
b. Electrical system diagram
23. Two technician are discussing the meaning
of different types of wiring diagrams.
Technician A says schematic diagrams tell
you how a circuit works and how the
individual components connect to each
other and they are commonly used by
engineers. Technician B says a system
diagram is drawing of a circuit or any part of