An Inspector shall make such examination as may appear to him to be necessary for the purpose of satisfying himself that the provisions of the Act and of the rules and any order passed by the Government under the Act are duly observed. In particular, he shall satisfy himself and make,-
(i) such examination of the premises and of any prescribed registers, records and notices and take on the spot or otherwise, evidence of any person as he may deem necessary, for carrying out the purposes of this Act; and
(ii) exercise such other powers as may be necessary for carrying out the purposes of this Act:
Provided that no person shall be required to answer any question or give any evidence tending to incriminate himself.