Hi Jishu,
There is no default values for inspection type at the plant level. Inspection type's default value in configuration applies to all plant.
You can create new custom inspection type with the same inspection origin to set the different default value and then assign this new custom inspection type for a particular plant. But I think this may cause some confusion down the road.
Another option is to look into QA08 to mass update inspection type setting for your plant if the default value setting would not fit for certain plant.
Or you can suggest to the users to check or uncheck certain setting for the inspection type in the plant where default value would not apply.
Hope this helps.
Alan