Q1
Why the quality of sand deteriorates if the same molding sand is used again and again?
A.
Build up of clay and other organic coatings on the molding sand particles
B.
Presence of foreign and scrap matter like iron particles, feyalite, etc.
C.
Occurrence of pieces of oil sand
D.
All of these
AnswerAnswer: Option D
Solution
Answer: Option D
No explanation is given for this question Let's Discuss on Board