Question 1

Why are stranded cooper wires used instead of solid copper wire?

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Question 2

What type of connection is used to pass large bundles of wires between the passenger compartment and the engine compartment?

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Question 3

Name five types of conductor materials.

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Question 4

Splicing aluminum wire is being discussed. Technician A says to solder the wires by coating them with petroleum jelly to control the temperature of the soldering iron. Technician B says to cover the splice with electrical tape. Who is correct?
A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Accepted Answer

Both of the techniques described by Technician A and B are not recommended for splicing aluminum wires. Neither petroleum jelly nor electrical tape is a suitable method for splicing aluminum wires, as aluminum wire requires specialized connectors and methods of splicing to ensure a safe and effective connection.

Question 5

What is a remote ground?

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Question 6

In the AWG standard, what is the relationship between wire diameter and AWG size?

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Question 7

____ wire means the conductor is made of several individual wires that are wrapped together.
A) Stranded
B) Copper
C) Primary
D) Secondary

Accepted Answer

Stranded wire is made of several individual wires that are twisted or braided together, which increases flexibility and durability compared to a single solid wire. Copper, primary, and secondary refer to different aspects of the wire that are unrelated to whether it is stranded or solid.

Question 8

What are the factors concerning wire size selection that need to be considered when adding an accessory?

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Question 9

Describe four steps taken to successfully diagnose an electrical problem.

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Question 10

What does the symbol labeled "G200" in the figure below indicate?

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Question 11

Which of the following is NOT part of the troubleshooting process?
A) Confirm the customer concern.
B) Determine operation of shared circuits.
C) Replace the component identified by the DTC.
D) Confirm the repair.

Accepted Answer

While replacing a faulty component may be part of the troubleshooting process, it is not always the solution and should not be the first step taken. Other steps such as confirming the customer concern and determining operation of shared circuits should be taken first. Once a component is identified as faulty through diagnosis, then it may be appropriate to consider replacement. Confirming the repair is also an important step to ensure that the issue has been fully resolved.

Question 12

Technician A says that wiring harness that run close to exhaust manifolds must be housed in PCV conduit. Technician B says printed circuits cannot be repaired. Who is correct?
A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Accepted Answer

Wiring harnesses near exhaust manifolds are typically protected by heat-resistant materials, not PCV conduit. Printed circuits can sometimes be repaired, depending on the extent of the damage and the specific circuit.

Question 13

Explain at what point during an electrical repair would component, splice, ground, and connector locators be used.

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Question 14

In most wiring color codes, what do the first and second group of letters on the wiring diagram indicate?

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Question 15

How is wire size determined?

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Question 16

What information is available to determine the exact location of electrical components on a vehicle?

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Question 17

Explain why automobile manufacturers color code wires in the electrical system.

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Question 18

How can a test lamp be used help locate a shorted or "overloaded" circuit?

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Question 19

What is a wiring diagram and what kind of information is provided?

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Question 20

Technician A says it may be necessary to route a new wire to bypass a damaged conductor. Technician B says to install a grommet anytime a wire passes through the body. Who is correct?
A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Accepted Answer

Technician A is correct that sometimes it may be necessary to bypass a damaged conductor by routing a new wire. Technician B is also correct that a grommet should be installed anytime a wire passes through a body panel to prevent chaffing and damage to the wire. Therefore, both technicians are correct.

Quiz 4: Wiring and Circuit Diagramswiring Repair and Reading Circuit Diagrams