There Are Several Different Types of Spark Plug Thread Inserts

question 17

Multiple Choice

There are several different types of spark plug thread inserts. While having a discussion, Technician A says that when a spark plug uses a sealing washer, the insert is plated with a copper flash. Technician B says that when a spark plug in a cast iron head has a tapered seat, silver-plated inserts are used. Who is correct?

• A)A only
• B)B only
• C)Both A and B
• D)Neither A nor B

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