<p>AUBT PRACTICAL EXAMINATION WORKSHEET</p><p>Name:______</p><p>Base Metal Sample</p><p>1. Detect any backscatter signals in sample provided. Base Metal Sample #: </p><p>2. Identify the pattern type of any backscatter signals and apply the appropriate procedure. </p><p>Pattern Type: I II III IV </p><p>3. Store and recall to a document (or print) the backscatter signals. Images required:  10 MHz backscatter of Reference block: Image#: ______ 10 MHz backscatter of Indication from base metal sample: Image#: ______ 5 MHz backscatter of Indication displayed appropriately: Image#: ______ Spectrum Analysis of both Reference and Indication: Image#: ______ Velocity Ratio Method 1 - Show images of 1st and 2nd backwall signals from both L-wave and S-wave with cursors visible: Image#: ______ Velocity Ratio Method 2 – Show image of backwall signal (or interface) with absolute curser visible from both L-wave and S-wave: Image#: ______ Spatial Averaging of Indication: Image#: ______ Spatial Averaging of Reference block signal: Image#: ______</p><p>4. Complete the information requested for all sections below. Then, circle methods used for Analysis according to the appropriate procedure. A. 10 MHz Backscatter: Image#: _____ B. 5 MHz Backscatter: Image#: ______C. Spectrum Analysis a. Attenuation increase with frequency? Yes __ No _ b. If Yes, Attenuation at 10 MHz: dB Attenuation at 5 MHz: dB D. Velocity Ratio:  Method 1: a. Base Metal Sample L-wave (µs): b. Base Metal Sample S-wave (µs): c. Velocity Ratio: ______</p><p> Method 2: d. Cal Block Delta t1 L-wave (µs): e. Cal Block Delta t2 L-wave (µs): f. Delay (L-wave): ______g. Cal Block Delta t1 S-wave (µs): h. Cal Block Delta t2 S-wave (µs): i. Delay (S-wave): ______</p><p> j. Base Metal Sample uncorrected L-Wave (µs): ______k. Base Metal Sample uncorrected S-Wave(µs): ______l. Velocity Ratio (corrected): ______E. Spacial Avaraging</p><p>Base Metal Flaws Detected: Yes No ___ Circle Flaw Type(s) Detected:  HTHA, Laminations, Inclusions Base Metal HTHA Detected: Yes No ____ Height of HTHA if Detected: ______</p><p>Weld HAZ Samples</p><p>1. Detect any weld HAZ indications. 2. Use ABSA procedure to make the correct call. 3. Store and recall (or print) all relevant supporting data. Images required:  A-Scan with wedge delay and ID cursors set a. Wedge Delay in µs: ______b. Sample Thickness in µs: ______c. Sample Thickness in inches: ______Sizingd. ID ConventionCursor Value in µs: ______ Spectrum0 analysis of reference and suspect signal Cross section Flaws Detected: Yes No ___ Circle Flaw Type(s) Detected:Depth</p><p> HTHA, ID Crack, Lack of Penetration ( LOP ), Lack of ThicknessFusion ( LOF ), Porosity, Slag Height Weld/HAZ HTHA Detected: Yes No ___ Flaw Size: Start Length a. Start location: ______b. Length: ______c. Height: ______d. Depth: ______</p>