Blow holes in castings are due to

Related MCQs

• As compared to green sand in shell moulding cooling rate of cast metal is slow. Hence as compared to green sand castings, shell moulded castings will have
• Warped castings may be produced due to
• A defect in castings in which a discontinuity is formed due to the imperfect fusion of two streams of metal in the mould cavity is known as
• Swelling of castings may occur due to
• In small castings which of the following allowance can be ignored?
• Which heat treatment is applicable to aluminium alloy castings?
• Heat treatment of castings is usually done for
• Which of the following test on castings is based on sound?
• Distortion in castings can be reduced by
• In die castings, heavy local sections are usually avoided and replaced by