Planet Mechanical Engineer interview questions

I received an email response 2 months after submitting my resume. Scheduled and spoke with the HR lady via skype call who seemed very open and honest about their current process as they're in the middle of filling in more of their managerial roles which may take another 2 months (from the time I spoke with her). Later scheduled a phone interview with their lead engineers who asked me more technical questions. I honestly hated the latter interview as it was done via phone where the interviewers were rather laconic and monotoned in their voice, making it incredibly difficult (if not impossible) to gauge their feedback.