Q.

A primary purpose of a reference standard is:

A. To provide a guide for adjusting instrument controls to reveal discontinuities that are considered harmful to the end use of the product
B. To give the technician a tool for determining exact discontinuity size
C. To provide assurance that all discontinuities smaller than a certain specified reference reflector are capable of being detected by the test
D. To provide a standard reflector which exactly simulates natural discontinuities of a critical size
Answer» C. To provide assurance that all discontinuities smaller than a certain specified reference reflector are capable of being detected by the test
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