Schweitzer Engineering Laboratories Applications Engineer interview questions

1at step HR phone call - why r u interested. sEL values and which relays I worked with and basic qualifications and visa. Related 2nd step 1 hour online interview, with 4 team members and akse me technical questions and past experience. And also they asked me about why we need protection and why we need CT short while we open it in live condition , asked me about damage curve of the equipment, asked me I am comfortable with presentation and teaching and handling large audience 3r round - ppt presentation of SEL 710 application guide, tour of office , meeting with all other people, lunch and hr meeting for Benifits explanation. After that hiring manager Email me for 15 minutes short call on Friday afternoon and I was at work and my current shift is afternoon. I have no phone policy at current job I could not reply same day. And on weekends I felt unprofessional to reply so I reply on monday. After that no response or feedback yet and most likely a rejection. But they could have handled professionally while considering SEL values.