Which of the following temperature ranges (in Kelvin) can start the re-melting of droplets of casting material?(a) 400 – 450(b) 450 – 500(c) 500 – 600(d) 600 – 700I got this question in exam.Asked question is from Solidification with Constant Surface Temperature in chapter Cooling and Solidification of Casting-Forming-Welding I

Which of the following temperature ranges (in Kelvin) can start the re

1.	Which of the following temperature ranges (in Kelvin) can start the re-melting of droplets of casting material?(a) 400 – 450(b) 450 – 500(c) 500 – 600(d) 600 – 700I got this question in exam.Asked question is from Solidification with Constant Surface Temperature in chapter Cooling and Solidification of Casting-Forming-Welding I
Answer» Correct answer is (d) 600 – 700 The explanation: As the FIRST droplet solidified when the successive droplets MAKE an impact to it and the temperature of the pre-solidified droplet is very close to its melting temperature. The droplet temperature is approximately greater or equals to 623 K, at which the pre-solidified droplet re-melts and SHOWS re-melting behaviour at different time INSTANTS.

Discussion

No Comment Found

Related InterviewSolutions

Cold cracking failure of the casting product can be avoided by shot peening method which induces internal stresses in the casting.(a) True(b) FalseThis question was posed to me during a job interview.Question is taken from Residual Stress in chapter Cooling and Solidification of Casting-Forming-Welding I
Residual stresses can cause any defects in the casting except distortion of the casting component.(a) True(b) FalseThis question was addressed to me during an interview.I would like to ask this question from Residual Stress in chapter Cooling and Solidification of Casting-Forming-Welding I
Residual stresses can also be calculated the same way as the stresses due to the external loads is calculated.(a) True(b) FalseI got this question during an interview.This is a very interesting question from Residual Stress topic in chapter Cooling and Solidification of Casting-Forming-Welding I
Natural aging treatment is a fast and accurate method for reducing residual stresses in the casting compared to the heat treatment.(a) True(b) FalseThe question was asked during an interview for a job.I would like to ask this question from Residual Stress in division Cooling and Solidification of Casting-Forming-Welding I
In casting system, the riser is generally placed at the heaviest section to avoid defects from the casting.(a) True(b) FalseThe question was posed to me during an interview for a job.I need to ask this question from Riser Placement topic in chapter Cooling and Solidification of Casting-Forming-Welding I
By using resin bonded sand in the making of mould, the stresses produced in the casting can be reduced.(a) True(b) FalseI got this question in quiz.My question is taken from Residual Stress in division Cooling and Solidification of Casting-Forming-Welding I
Manufacturing process is the only consideration which can cause residual stresses in the casting.(a) True(b) FalseI got this question in an international level competition.This intriguing question comes from Residual Stress in division Cooling and Solidification of Casting-Forming-Welding I
It is always desirable to have a large volume of molten metal in the riser to make casting products.(a) True(b) FalseI had been asked this question during an interview.This question is from Riser Placement topic in portion Cooling and Solidification of Casting-Forming-Welding I
Minimization of friction between the mould and casting surface can reduce the chances of tearing of thin parts of the casting.(a) True(b) FalseThe question was posed to me during an interview for a job.My question is taken from Solidification with Predominant Resistance in Mould topic in chapter Cooling and Solidification of Casting-Forming-Welding I
Machinability of the casting product can be improved by reducing the residual stresses in the casting.(a) True(b) FalseThe question was posed to me during an interview.The doubt is from Residual Stress in portion Cooling and Solidification of Casting-Forming-Welding I

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment