The Library also has a number of print and Ebooks on how to write a literature review and how to undertake a dissertation project. Some of these are specifically written for Engineering projects. A collated list of these titles is available:
Reading list of books explaining how to do a Literature Review and undertake a research project
A 'thesis' in the UK refers normally to Doctoral/ PhD level research work, while a 'dissertation' refers to Undergraduate/Postgraduate Taught level original work of a shorter length.
Theses and dissertations are not peer-reviewed but a PhD Thesis will be a very high-level piece of in-depth work and would only 'pass' after a successful defence of the thesis by the author in front of a panel of academics. (If you find a useful PhD thesis, it is worth checking Scopus or Web of Science for an author profile as it is quite common for authors to publish articles arising from the thesis.)