Hi
1.Does a Post graduate certificate increase points?...its not a masters' but its a post graduate qualification.
It does. But you'll need an ECA if it is done outside Canada.
2.how long it usually takes to get results from express entry program?
After getting an ITA, 80% applicants profiles are expected to be processed within 6 months. Time taken for getting an ITA depends entirely on your CRS score.
3.IELTS Academic or general.
General
Thanks