A former colleague, not doing particularly well with the technical component of an interview some years ago was asked if he could identify the type of aircraft depicted in a painting hanging on the fleet managers office wall. He responded by enquiring if the interviewer thought he was some sort of plane-spotter! (It was a Herald if I recall). He got the job.
I feel that technical stuff is important though, I mean we don't have flight engineers any more so apart from knowing where to find the cheapest beer and cooked breakfast down-route is it too much to expect candidates to know something about the aircraft they either currently fly or are interviewing for irrespective of the effectiveness of such questioning for 'weeding out' the weak interviewee or bul******ers. I continue to be surprised by the lack of general knowledge many younger F/O's demonstrate and being unable to identify aircraft types seems to be quite common these days.