If you have a local Master Degree, I don't think you need any interview. You can write Ethics and law right after the assesement of your academic and experience background. Normally in Ontario, the PPE tests are in April, August and December. It took 2 about months (45 working days) to get your results and another month or so to receive the letter of the PE entitlement. You have to wait for another month or so to receive your seal and licence. If you select to participate in a ceremony, that would take longer, say another 1 or 2 months.