If you are living in Rajasthan and want engineering question papers as printable PDFs then you can search for state level exam and university exam collections, for example Rajasthan Technical University provides previous year papers for digital electronics programming mathematics and other papers, you can download them from exam portal and print at home, for national entrance you may find JEE Main sample papers and AP EAMCET or TS EAMCET as practice even if not in Rajasthan, if you are Indian living aspirant and want to study abroad you can also find international engineering entrance test papers like SAT or AIEEE sample papers for practice, all these papers help you get used to question format and time management before exam, you can find many PDF links here

https://engineering.careers360.com/articles/jee-main-question-papers

https://engineering.careers360.com/articles/ts-eamcet-question-papers

https://engineering.careers360.com/articles/kcet-question-papers