Question

__________ is a binder that becomes hard on baking.

(a) Marine animal oil

(b) Wood Resin

(c) Oil Resin

(d) Coal tar resin

I had been asked this question during an online exam.

I'd like to ask this question from Binders and its Applications topic in division Casting Processes of Foundry and Forging

Answer 1

Right option is (a) Marine animal oil

For explanation I would say: Marine animal oil is of the group of binders that do not develop their strength by any kind of physical or chemical changes, rather they are baked to harden them. Usually, Whale oil (Sperm oil) is used for binding applications.