Which of the following is used for the reduction of friction between the mould’s surface and metal strand?(a) Water(b) Casting powder(c) Oil(d) GreaseI got this question in a job interview.My question is from Continuous Casting topic in section Special Casting Techniques of Casting-Forming-Welding I

Which of the following is used for the reduction of friction between t

1.	Which of the following is used for the reduction of friction between the mould’s surface and metal strand?(a) Water(b) Casting powder(c) Oil(d) GreaseI got this question in a job interview.My question is from Continuous Casting topic in section Special Casting Techniques of Casting-Forming-Welding I
Answer» The correct ANSWER is (B) Casting POWDER The explanation: In continuous casting, at the beginning of solidification of molten metal in the mould, the casting powder is added onto the top side of molten metal in the mould. This casting powder melts and penetrates between the SURFACES of the mould and solidified strand to minimize the friction, which leads to completion of the OPERATION in less time.

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