I found this one a bit tricky, and at the first attempt failed it. 2nd time around i got through it. I seem to remember there were lots of pictures, what type of bend is this, one about the soil stack distance from a window, secondary ventilation, single stack principles, again go over your notes fm the classroom, look thorugh the JTL book and if you can get onto smartscreen go there as the questions are the same wording as your exam questions. I got some questions from smartscreen in my exam
Good luck
Andy