Firstly aptitude then technical +Hr and then Final HR round. In aptitude there were general apti question as well as technical questions and had to answer 30 question in 45 minutes which was decent enough followed by the technical interview which was moderate and HR interview which was easy

Was moderate level..mostly based on cooling Tower, Corrosion, scaling and fouling. 30 mins duration and online interview. Two rounds of interviews are there. First a technical interview and second as a hr interview. But if you cleared the first level. You got selected