Which scan type can be used to produce a recording of flaw areas superimposed over a plan view of the test piece?

Which scan type can be used to produce a recording of flaw areas superimposed over a plan view of the test piece?

• A. A scan
• B. B scan
• C. C scan
• D. D scan

Answer: (C)

The main idea is that this display mode shows flaw locations mapped across the surface plane of the part, giving a top-down plan view. A C-scan does exactly that: the probe is scanned over the area and echoes corresponding to a chosen depth are plotted at their X-Y coordinates, producing a map of flaws superimposed on the plan view of the test piece. This lets you see where flaws lie across the surface. In comparison, A-scan provides amplitude versus time at a single point, B-scan gives a cross-sectional slice showing depth along one line, and D-scan maps depth versus scan position along a line rather than a full plan view.

The main idea is that this display mode shows flaw locations mapped across the surface plane of the part, giving a top-down plan view. A C-scan does exactly that: the probe is scanned over the area and echoes corresponding to a chosen depth are plotted at their X-Y coordinates, producing a map of flaws superimposed on the plan view of the test piece. This lets you see where flaws lie across the surface. In comparison, A-scan provides amplitude versus time at a single point, B-scan gives a cross-sectional slice showing depth along one line, and D-scan maps depth versus scan position along a line rather than a full plan view.