Question

_________________ is a binder that becomes firm at room temperature.

(a) Dextrin

(b) Pitch

(c) Rubber Latex

(d) Molasses

This question was posed to me in an interview for internship.

This interesting question is from Binders and its Applications topic in portion Casting Processes of Foundry and Forging

Answer 1

Right option is (c) Rubber Latex

For explanation: Rubber Latex is rubber cement. Silica is mixed with water and this latex which is obtained of the plant is added to it. This mixture is then rammed and it hardens at the room temperature and has excellent binding properties.