After AT Welding First train is to be passed after ?
(i) 20 Minutes from pouring of weld metal.
(ii) 35 Minutes from pouring of weld metal.
(iii) 30 Minutes from pouring of weld metal.*
(iv) 25 Minutes from pouring of weld metal.
(i) 20 Minutes from pouring of weld metal.
(ii) 35 Minutes from pouring of weld metal.
(iii) 30 Minutes from pouring of weld metal.*
(iv) 25 Minutes from pouring of weld metal.