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

Question

Quizplus · Accepted Answer

Both Technician A and Technician B are correct in their statements regarding the use of different types of spark plug thread inserts. Copper flash plated inserts are indeed used for spark plugs that utilize a sealing washer to ensure a proper seal and prevent leakage. Similarly, silver-plated inserts are used for spark plugs in cast iron heads with a tapered seat to ensure a good electrical and thermal connection, as well as to prevent seizing and corrosion.

There Are Several Different Types of Spark Plug Thread Inserts