In melting of aluminium, the dross consists of

Related MCQs

• Normal shrinkage allowance for aluminium is 18 mm per metre and that for cast iron 10 mm per metre. If the metal pattern is to be made of aluminium and the casting is to be of cast iron, the shrinkage allowed on wooden master pattern will be
• Slag and dross can be removed by
• In fluminium foundry, for removing dissolved hydrogen and the entrapped dross, the flux used is
• If dross and slag along with the liquid metal reach the mould cavity they produce the defect known as
• Which heat treatment is applicable to aluminium alloy castings?
• Aluminium is not a very good material for die casting because
• Annealing of aluminium castings
• For annealing of aluminium it is heated to
• For aluminium alloys grain refinement can be achieved using
• Inoculants are added to aluminium mainly for