Does passing by grace in a BE exam twice from a CSVTU university have any impact on the job during placements?

This depends on the companies, as they have their own criteria for shortlisting candidates on the basis of their academics.

Most of the companies set criteria around 60% throughout in B.E without any backlog. Many companies will set criteria on your 10th and 12th marks, such as 70% above in 10th and 65% above in 12th. These criteria may change according to the company you are applying for.

Having grace in a subject means that you have cleared the subject and the semester. You will be eligible to sit for most of the companies. This is true for almost every company that chooses to do recruitment from CSVTU. Your grace in subject will not have any impact on placements.