Are there any specific limitations on the powers of a public service commission under the Indian Constitution?
Yes, there are specific limitations on the powers of a public service commission under the Indian Constitution. The limitations are as follows:

1. Public Service Commission for the Union and States must operate within the framework provided by the Constitution (Article 315).
2. They can be abolished or reconstituted by a constitutional amendment (Article 317(1)).
3. The Governor of a State may request the Union Public Service Commission to serve all or any needs of the state, with the approval of the President (Article 315(4)).
4. The Parliament may provide for the appointment of a Joint State Public Service Commission to serve two or more states if they agree and pass a resolution (Article 315(2) and (3)).