Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of __________________?

A. Aqua regia
B. Ferrous sulphate
C. Hydrochloric acid (10%)
D. None of these

A. Boron
B. Antimony
C. Gallium
D. None of these

A. Used in very high temperature applications
B. Non-biodegradable
C. Not suitable for drainage pipe manufacture
D. All A., B. & C.

A. Aluminium
B. Nickel clad steel
C. Lead lined steel
D. Glass lined steel