Which of the following is a legal and commonly used trap?
A. Bell trap
B. S Trap
C. Drum trap
D. P trap

I don't know about the legality, but the answer is D; a 'P' trap.

XenoSapien

P trap

Which radon level is the highest?
a. 0.3WL B. 3wl C. 3pCI/L D.0.3pci/L

Don't know. I slept through that class like you.

Every once in awhile we get questions like this when someone is taking a test to become a building inspector or to get some sort of license. It's a lot like the kids who come here with homework questions. I always help them but never give them the answer.