Which of the following is not the function of coating of refractory materials on the mould?(a) Prevent the soldering of metal to the mould(b) Minimize thermal shock to the mould(c) Control the rate of casting solidification(d) Increase the heat transfer rateThe question was asked in an online interview.The doubt is from Permanent Mould Casting in chapter Special Casting Techniques of Casting-Forming-Welding I

Which of the following is not the function of coating of refractory ma

1.	Which of the following is not the function of coating of refractory materials on the mould?(a) Prevent the soldering of metal to the mould(b) Minimize thermal shock to the mould(c) Control the rate of casting solidification(d) Increase the heat transfer rateThe question was asked in an online interview.The doubt is from Permanent Mould Casting in chapter Special Casting Techniques of Casting-Forming-Welding I
Answer» Right OPTION is (d) Increase the heat transfer rate For explanation: The moulds are coated with a REFRACTORY material to increase the mould life by preventing the soldering of metal to the mould, by controlling the direction and rate of the casting SOLIDIFICATION and also by minimizing the thermal shock to the moulding material. Coatings can be a mixture of sodium silicate, clay, soap, stone, talc etc.

Discussion

No Comment Found

Related InterviewSolutions

Pattern used in shell moulding is normally made up of?(a) Wax(b) Metal(c) Wood(d) PlasticI got this question in quiz.This intriguing question comes from Special Casting Techniques topic in division Special Casting Techniques of Casting-Forming-Welding I
Co2 moulding is a kind of sand moulding, but it is not economical than the green sand moulding.(a) True(b) FalseI have been asked this question during an internship interview.My question is taken from CO2 Process in division Special Casting Techniques of Casting-Forming-Welding I
It is very safe to use Co2 in Co2 moulding, so it eliminates the use of any shielding apparatus.(a) True(b) FalseI had been asked this question in an interview for job.This interesting question is from CO2 Process topic in chapter Special Casting Techniques of Casting-Forming-Welding I
Sometimes over-gassing can cause the sticking of pattern to the mould in Co2 moulding.(a) True(b) FalseThe question was asked by my school teacher while I was bunking the class.Origin of the question is CO2 Process in division Special Casting Techniques of Casting-Forming-Welding I
Which of the following methods of casting is the fastest method for the production of constant cross-section shapes of casting?(a) Permanent mould casting(b) Centrifugal casting(c) Continuous casting(d) Die castingI have been asked this question in an online quiz.The doubt is from Continuous Casting topic in section Special Casting Techniques of Casting-Forming-Welding I
The axis of rotation of the mould should be horizontal for the casting of long pipes in centrifugal casting.(a) True(b) FalseI had been asked this question during an online exam.The above asked question is from Centrifugal Casting in section Special Casting Techniques of Casting-Forming-Welding I
Rapid solidification rates of casting tend to have a reduction in oxidation of the material.(a) True(b) FalseThis question was posed to me in an online quiz.This intriguing question originated from Vacuum Die Casting in chapter Special Casting Techniques of Casting-Forming-Welding I
Which of the following helps in reducing the oxidation of the material in vacuum die casting?(a) Mould thickness(b) Mould material(c) Tight tolerances(d) Mould coatingThis question was posed to me during an interview.My question is based upon Vacuum Die Casting in chapter Special Casting Techniques of Casting-Forming-Welding I
The die life is less for higher melting temperature alloys in gravity die casting.(a) True(b) FalseI had been asked this question in an interview.This interesting question is from Gravity Die Casting topic in section Special Casting Techniques of Casting-Forming-Welding I
Air cooling is sufficient to maintain temperature for the large and thick-walled castings in gravity die casting.(a) True(b) FalseThe question was posed to me in final exam.My query is from Gravity Die Casting topic in division Special Casting Techniques of Casting-Forming-Welding I

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment