yes and if you aquire lets say 4 cards and you already hav 2 it will let you hand in a set in the middle of your turn becasue you cnt hav more than 6 cards
and the rules differ slightly from the modern version of risk if you have more than 5 cards. For example, if you have 6 cards and you can make 2 sets you can cash both in right away so use that to your advantage. I believe this is in line with the original rules of risk, pre-1970 or something so you may not be used to that system.