From my experience with SAE Baja racing, I would say that it is a lot less about what the jump looks like, and more about if the kart should be doing jumps. Our mini baja karts have a suspension travel of about 10 inches front and 12 rear, they also have a ground clearance of probably 12 inches. It is next to impossible to flip them and we will take some pretty serious ramps going up to 30mph and rarely flip. I was also once riding in a kart similar to those adult trailmaster ones you see and we took a jump(maybe 2 foot rise over 5 feet with a 4 foot drop behind it) and the front bottomed out and we almost went end over end. So in the end I would say that it is beefy suspension that allows you to safely do jumps, not the jump itself.
That being said, I doubt you have a kart with $3000 suspension like our baja cars. So I would just keep the ramps low and make sure you take them with enough speed to not flip