As you have asked about the Rajasthan Pre Engineering Test (RPET) seats of Schedule tribe (ST) class, I am giving you information about it

I want to tell you that RPET has been scrapped by the Rajasthan government.
For admission to the engineering colleges in Rajasthan, score of Joint Entrance Examination (JEE) Mains are considered.
Here I am giving you information about the reserved seats in JEE Mains.

JEE Main Reserved Seats For Each Categories

Scheduled Tribes (ST): 7.5%
Other Backward Classes (OBC) only Non-Creamy Layer candidates: 27%
Scheduled Castes (SC): 15%
Persons with Disability (PwD): 3%

JEE Main Reservation of Seats – Reservation Clauses And Conditions

If a candidate wishes to avail the reservation, they are required to submit proper original documents and certificates at the time of counselling.
These documents and certificates must be duly signed and attested by a respective officer, in an appropriate format.
No candidate will be allowed to claim reservation if the documents are found to be missing or in photocopy, regardless of the status of the claim.
In case of absence of these documents, a candidate will not be considered in special class reservation list but in central general candidates list.