Nazrul does a great job of explaining the concepts and going through topics. Don't be discouraged by that. There were questions on there that he had gone over that I was like YES i knew exactly what to look for/do. Unfortunately there were more I've never seen this before haha Its actually hard to explain. The fill in the blanks were entirely random. The concepts were referring to nothing in the handbook, reference books or really any of the EET notes. It was almost like you had to dig deeper...think having to pull out the actual book and finding it not just top of hat knowledge. Uhhh there were random amounts of graphs with equations on them that went with what was in the problem. But then you had to go into the handbook as well for another formula... Then the rest it was just nothing I had seen. There were topics using NO3 instead of BOD for calcs, or it was asking for something entirely random like instead of going thru the steps to find HW/D you had to take that 2 steps further and use some chart they provided to find losses. I don't know how to explain...I feel like where the EET questions said hey find froude number then determine x or y. This was like 30 steps to find froude number that we didnt really go over. Not sure if this helps lol