the power booster which is given in sandeep garg is just for knowledge enrichment and the content is out of course as written in the book but do questions related to power booster are asked by the board in 12th?

As, it is specified in the book that the questions presented under the section of 'Power Booster' is out of syllabus, so in the board exams, these should not be asked. However, it would be better if you could provide us with a couple of sample questions, so that we can go through them and let you know about their probability of appearing in the board exams.