Calcareous & argillaceous materials are used in the manufacture of ___________________?

A. Filtration
B. Boiling
C. Distillation
D. None of these

A. Red
B. Yellow
C. Violet
D. Black

A. Impart flexibility
B. Improve workability during fabrication
C. Develop new improved properties not present in the original resins
D. All A, B. and C.

A. Na2SO4.10H2O
B. CaCl(OCl)
C. CaSO4.H2O
D. (NH4)2SO4

A. 1 – 2
B. 15 – 20
C. 50 – 60
D. 80 – 85