When an etching agent is applied to a metal surface in order to restore a removed serial number, the stamped area will dissolve at ________ the unstamped area.
A)A greater rate than
B)The same rate as
C)A slower rate than
D)None of the above

Question

Quizplus · Accepted Answer

When an etching agent is applied to a metal surface, the stamped area (where the metal has been deformed and stressed) will dissolve at a greater rate than the unstamped area, revealing the serial number.

When an Etching Agent Is Applied to a Metal Surface