At this time you have applied for SINP and SINP office is not going to that extent to verify your indian work exp, but once you get your nomination and further when you file in CHC then the CHC could do verification about you work experience in India.
By the way CIC has done some changes in regard to PNP application, now after getting your nomination you must submit your application to the Centralized Intake Office (CIO) in Sydney, Nova Scotia, Canada. Make sure you check the link below:
http://www.cic.gc.ca/english/immigrate/provincial/apply-application.asp