Great site and forum! i'm from Toronto ,working residential, some comm. Wrote my exam last week , this one still bug me: What a minimum mesh around the globe of an arc lamp? (was something like that)
I've looked at my code book as well as my code handbook, and they don't specify a minimum size. The province you live in may have ammended the rule, but I don't think a minimum number exists.
Are you sure it said what was the minimum size? Sounds like the question is worded wrong but with the reference in the code I bet the answer they were looking for is 32mm as you said. Did you put 32mm and they said that it was wrong?