NRTI is a university which offers only two courses B.sc in Transportation engineering and BBA in transportation management and SCRA is a exam which is conducted by UPSC.After clearing the exam you have to do bachelor programme in mechanical or electrical engineering from IRIEM college.Both NRTI and SCRA are associated with railways.
Hope it answer your concerns.
No, they are different.
The National Rail and Transportation Institute (NRTI), a vision of the Honorable Prime Minister Narendra Modi, is India’s first university focussed on transport-related education, multidisciplinary research and training.
SCRA (special class railway apprentice) is an entrance exam, which is held by upsc for giving jobs to candidates in Railway Department. It is a royal job that provides handsome remuneration and security to candidates