Just completed CHUF with 85% final score... so pleased with that. In the spirit of giving back, here are a few observations that may be of assistance for those yet to sit this exam:
(1) I estimate 25 to 33% of the examination related to TEM. Of these, some questions were very easy (eg. Preparing a contingency plan in the event of bad weather is an example of a ___ counter measure. Planning, Execution, Review?) while others were tricky. Tricky questions seemed to boil down to interpretation and perspective. I would suggest these questions are not appropriate in a multiple choice format where answers are graded unambiguously right or wrong.
There were virtually no questions requiring the classification of threats according to the Bob Tait or CAAP schema. That said, I think the Bob Tait book is as good as you're going to get until CASA write some TEM training materials (at which point they will realise the folly of applying a rigid schema to a situation that is subject to variations in interpretation and perspective).
(2) 75 minutes are available to complete the exam of 41 questions. This at least double and probably triple the amount of time required if you are prepared. Most of the questions (with the exception of some TEM Qs) were of the "you know it or you don't" type. With these, as always, (i) read the question, (ii) read all the multi-choice options, (ii) select the best option. Then, (iv) read the question again, (v) confirm your selected answer satisfies the question, (vi) confirm the other (rejected) options DO NOT satisfy the question. This two step approach (prove the answer AND disprove the distractors) is powerful because it forces you to think through 4 (or 5) options and logically "pass" or "fail" each of them.
(3) All questions were multiple choice except for one. It was a "How long does it take until ....?" type. I know enter the numeric answer type questions are creeping into the PPL exams, so maybe we're going to see more of these in other exams, too.
(4) Other than TEM (and in the words of someone at my flight school, "it's so much g*d-da*mned bullsh*t"), the Bob Tait book is a very good preparation resource and, if you learn all that's in the book, you can walk into the exam and be extremely confident of a strong pass.
Good luck.
Cheers, H