Which of the following will increase the strength of a sample of 90% SiO2 - 10% MgO

Answer 1

what's on the list?

Answer 2

Quench the entire sample in water

Quench half of the sample in water

Cool the entire sample with air jets

Cool half the sample with air

Submerge the sample in a salt bath of Na2O

Submerge the sample in a salt bath of CaO

Answer 3

A, C & F