Technical Round is extremely important as your job depends on it. Test your knowledge here and analyse which areas are important and which areas your actual strengths.
Quantitative Aptitude section in BHEL Placement Test will be selection intensive area. Recruitment in BHEL highly depends on your performance in quant section. Cover each and every prep test and practice paper.
Verbal Reasoning is an equally important section and needs practice if you wish to concert BHEL Placement Paper. Devote some time to attempt questions from this section and improve your overall scores.