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Q. |
Pitch maybe used up to what percent? |
A. | 1% |
B. | 2% |
C. | 3% |
D. | 4% |
Answer» B. 2% | |
Explanation: pitch distillation of soft coals plays a vital role in bonding theory. pitch is used for getting a good surface finish on iron casts. these pitches generally are used up to be to 2%. |
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