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Scab is a
  • a)
    Sand casting defect
  • b)
    Machining defect
  • c)
    Welding defect
  • d)
    Forging defect
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Scab is aa)Sand casting defectb)Machining defectc)Welding defectd)Forg...
Scab is sand casting defect caused due to improper ramming of moulding sand. Scab refers to the rough, thin layer of a metal, protruding above the casting surface, on top of a thin layer of sand. 
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Scab is aa)Sand casting defectb)Machining defectc)Welding defectd)Forg...
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Scab is aa)Sand casting defectb)Machining defectc)Welding defectd)Forging defectCorrect answer is option 'A'. Can you explain this answer?
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