Which One of These Statements Is NOT True

Multiple Choice

Which one of these statements is NOT true?

A) If cracks in a metal casting are found during an inspection, they should be repaired or the part replaced.
B) Stress or strain on a weak point of a casting causes it to distort at that point.
C) Immediately following crack repair by welding, it is important to flush the part with cold water.
D) Cracks in metal castings are the result of stress or strain on a section of the casting.