If dross and slag along with the liquid metal reach the mould cavity they produce the defect known as

Related MCQs

• 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
• The defect known as 'drop' occurs when the upper surface of the mould cracks and pieces of sand fall into the molten metal. This defect occurs due to
• Slag and dross can be removed by
• A casting process which can produce cylinders by inserting cores into molten metal poured in the mould is
• In fluminium foundry, for removing dissolved hydrogen and the entrapped dross, the flux used is
• In melting of aluminium, the dross consists of
• A mould which has good erosion resistance to metal flow and is also collapsible is
• Which of the following is used on moulds for magnesium castings to prevent metal mould reactions?
• Slag in a blast furnace is
• During the passage of molten metal through the coke, the carbon percentage of the molten metal increases. The absorption of carbon depends on