No, a central EWS certificate is not valid for the Rajasthan state PTET (Pre Teacher Education Test) exam.

The PTET is a state-level exam conducted by the Rajasthan government to determine the eligibility of candidates for B.Ed. (Bachelor of Education) programs in Rajasthan.

Each state has its own reservation system for admissions and government jobs. The central EWS reservation is meant for central government institutions and schemes.

While the official brochure for 2024 might not be available yet, you can refer to previous years' brochures (usually available on the exam authority website) to check the eligibility criteria for EWS reservation. Look for a section on "Reservations" or "Eligibility." These brochures typically mention that the EWS reservation is applicable to candidates with EWS certificates issued by the competent authority of the Government of Rajasthan.

If you meet the EWS criteria as per the Rajasthan government, you can apply for a state-specific EWS certificate. This will allow you to avail of reservation benefits in the PTET exam and other state government programs.

For the most up-to-date and reliable information, you can directly contact the Rajasthan PTET exam authority. They can clarify the specific EWS certificate requirements for the exam.

I hope it helps!