Which of the following additives are added to the sand in CO2 moulding for the improvement in collapsibility of the sand?
A) copper oxide
B) wood flour
C) aluminium oxide
D) oil
Correct Answer:
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Q2: The speed of rotation is almost double
Q3: Which of the following moulds or moulding
Q4: How much percentage of sodium silicate (Na2SiO3)
Q5: How much time (in a minute) is
Q6: It is very safe to use CO2
Q8: CO2 moulding process is an ideal process,
Q9: Moisture from the mould can be removed
Q10: CO2 moulding is a kind of sand
Q11: Which of the following defect is not
Q12: Which gas defect is caused by hydrogen
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