From a cursory look at the questions (i.e. without checking the details), I would reckon the answer schemes are correct and therefore, I would start to question the reference books you are using.
Definitely Q212, 290 and 276 are correct per the marking scheme so if there are errors in your learning material, you should take this up with your groundschool.
I notice that you have posted a few threads questioning the Volare answers but maybe the manuals need to be checked.
Cheers
Whirls