Sir,basically what is the difference between ACM and PEM in terms of course of study and practical field?

ACM is more oriented towards towards the construction industry while the PEM is a all purpose course. If you are a civil background person, ACM/ REUIM/IFDM are your main areas of interest. Mechanical or Electrical find more usage in PEM.

ACM and PEM are more or less same, just that ACM is little construction and civil oriented while PEM is more generalised Project Management.