Dear riyas88, I am mechanical engineer and as per my knowledge, total 25 questions, Local authority questions:5, general questions:5, core electrical :15 questions will be asked. Passing is : 52 minimum i.e 13 answers must be correct. I scored 48 and failed.
No proper syllabus for core. you have to study all electrical syllabus. In Mechanical almost same strategy. 90% your luck is required to pass and 10% only your effort, just kidding.
Best of luck guys!