Q. On the area-amplitude ultrasonic standard test blocks, the flat-bottomed holes in theblocks are: (Solved)
1. All of the same diameter
2. Different in diameter, increasing by 1/64 inch increments from the No. 1 block to the No. 8 block
3. Largest in the No. 1 block and smallest in the No. 8 block
4. Drilled to different depths from the front surface of the test block
- b. Different in diameter, increasing by 1/64 inch increments from the No. 1 block to the No. 8 block