Should I pursue a PG diploma in mechanical engineering at the NTTF (Nettur Technical Training Foundation), Bangalore?

No, I would not suggest you join Nettur Technical Training Foundation (NTTF) to pursue a PG Diploma in Mechanical Engineering. The quality of education at the institute has been going down gradually over the past few years. 

There has been no improvement in the infrastructure in the past few years. The institute does not have well-equipped laboratories. The workshops do not have the required resources to offer to the students of the institute. You would not be able to gain any experience in the practical application of all the concepts in the course.

Do not be fooled by the marketing and promotional banners and pamphlets of the institute. The companies mentioned in these promotional activities used to visit the campus years ago for recruitment purposes. Now, hardly a few of them visit the campus.