When in Doubt (Deice material in hiding)

I taught an airframe icing class a few weeks ago to about 30 students thirsty for aviation knowledge. During the class, I was given a copy of 80 questions from Transport Canada's website, the TP 10643, which I was told to hand out. These are great questions, but I am having a difficult time finding reference material or even better the answers. I did scan the "When in Doubt" write up but that doesn't have many of the answers. For example, the very first question: Frost, ice or snow on top of deicing or anti icing fluids....MUST be considered as adhering to the aircraft and a take off should not be attempted. I knew the answer but where the heck is it written? Again, great questions, but where is all the material?

Anyone?

Even a ground based propeller has to be deiced. What a task!

Even a ground based propeller has to be deiced. What a task!