OP is confused about the newman projection question regarding this compound on chad's quiz.
His explanation is pretty easy to understand. Looking down the C-2 C-3 axis, the larger circle (C3) needs to have an ethyl substituent as well as 2 H's. The dot in the middle of the larger circle (C2) needs an OH, CH3, and H.
Take a look at it again, I didn't get that question right until I looked closer - stupid mistakes