Explain how ultrasound can be used for weld inspection.
What will be an ideal response?
Sound is directed into the part with a probe held in a preselected angle or direction so that flaws will reflect some energy back to the probe. These ultrasonic devices operate very much like depth sounders, or "fish finders." The speed of sound through a material is a known quantity. These devices measure the time required for a pulse to return from a reflective surface. Internal computers calculate the distance and present the information on a display screen where an operator can interpret the results. The signals can be "monitored" electronically to operate alarms, print systems, or recording equipment. Sound not reflected by flaws continues into the part. If the angle is correct, the sound energy will be reflected back to the probe from the opposite side. Flaw size is determined by plotting the length, height, width, and shape using trigonometric rules.
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Answer the following statement(s) true (T) or false (F)
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What will be an ideal response?
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What will be an ideal response?
Vanish is produced by the chamfer at the starting end of the thread forming tool.
Answer the following statement true (T) or false (F)