It's standard practice in all industries not to reply to applications.
Not from my experience, every other industry I have worked in with the exception of aviation, has sent me a reply even if I did'nt get an interview.
I have worked in a number of industries too!!
I think it's rude not to reply, having said that I would'nt expect a reply from Ozjet for quite sometime given the large number of applications.
Cheers, HH.