At my hub it's just one of the many places they will put you starting out. No test. No extra dollar. Why does it deserve an extra dollar anyway? It's just matching colors. The fact it requires a test seems insulting.
You are not a sorter...you are a person whose job has been made easier because too many people couldn't do the actual job of sorting.
When. I sorted I had to know all zip codes for all service levels. Some we're easy because entire states would go to one belt for ground. Say IN and IL ground and 3 day we're red belt but air and 2 day we're blue belt.
Other states we're much harder to remember because they would have splits going to multiple belts and service level was different for each split. All of this at 1200+ an hour with unloaders too lazy to give you labels or remove irregs and open boxes half the time.
When I started sorting I was told it was the most secure job in the building. One bad sorter could stop multiple belts and make a sort late to go down....we could call out as much as we wanted but no one ever got fired because most supervisors couldn't do the job and it took a long time for most new people to become proficient. When I became a TCD they used to beg me to sort twilight after running package all day...they couldn't get good sorters fast enough.