hello 

pgcet is a post graduate entrance exam . It offers various post graduate degree entries like MTech , M.arch And ME. 

You may get the books from any branch students who pursued thier BTech from civil or electrical sciences to prepare for this exam . 

However this is an exam equivalent to GATE entrance exam , so you can prepare from gate prepartion book . 

You may look into the syllabus and go on reading the topics on internet . 

all The best .