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14: Review Questions
List at least two reasons for surfacing a part.
List three causes of wear.
What type of surfacing process uses powdered surfacing material?
A(n) _____ hardness tester forces a pointed diamond into the metal surface.
The ability to resist wear from sharp objects is called _____ resistance.
Describe the meaning of parts A, B, C, and D in the following surfacing electrode abbreviation.
Refer to Figure 14-9. What type of surfacing electrode could be used if important considerations were metal-to-metal wear resistance and excellent machinability?
Why should cast iron be preheated prior to applying a surface material?
What polarity is normally used with SMAW surfacing electrodes?
Why is a long arc used when surfacing?
A 3/8″ diameter electrode is used to make a stringer bead 3/4″ wide. How much wider is 3/4″ than 3/8″?
A 1/8″ diameter electrode is used to make a weave bead four times the diameter of the electrode. How wide is the weave bead?
A longer arc length is used when surfacing with SMAW. A welder normally uses a 1/8″ arc length. Which is slightly longer than 1/8″: 3/32″ or 5/32″?
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