Which of the following gases is used in the method of recirculation degassing?
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The effectiveness of vacuum treatment is reduced by the increase in surface area of the molten metal exposed to vacuum.
In vacuum treatment of molten metal, temperature of the melt can be decreased.
In vacuum degassing method, low viscosity is considered to have negative influence on the reaction rate.
The effect of temperature change is generally neglected during the vacuum degassing process.
In sand preparation, which of the following is not used as an additive?
Which of the following process deals with the amount of moisture to be added?
Which of the following process deals with preparation the mold sand?
Which of the following process deals with mixing the molding sand elements?
What is the temperature requirement of sand, for manufacturing?
To avoid difficulties in making of molds, sand should be cooled below what temperature?
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