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Q. |
Which of the following is not used for the formation of the molding sand? |
A. | silica sand |
B. | binders |
C. | additives |
D. | coal |
Answer» D. coal | |
Explanation: the coal is a material which is not used in the formation of the molding sand as the particle size of the coal is high and there are chances that it will react with the possible gases that are produced during the pouring of the metal and result in casting defects. |
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