My 3 year Old Moorpark Apricot Tree Had No Fruit
It should be a dwarf tree and it keeps growing, now over 12 ft. Last spring I trimmed the branches and it keeps growing new ones at least 3-4 from everyone cut end. But had not even one flower or one apricot. Looks very healthy. I do not use any fertilizer.
This link is to a publication from Utah State: http://extension.usu.edu/files/publications/publication/hg_363.pdf It discusses pruning apricots on page 9.
This article should help answer your questions: https://www.gardeningknowhow.com/edible/fruits/apricots/apricot-tree-not-fruiting.htm