So it depends essentially your position and if someone is already back in the game or not. Although most members of this forum, you will say that they are almost always ...
First, assume that no one has yet returned the blow.
These KQ KJ QJ 3 hands are traitors for beginners, which are two figures and think they have a good hand.
In early position, throws KJ and QJ. KQ plays depending on your opponents, if good players it is better to throw, if the level is low, plays.
Middle position with KQ must be revived with KJ mostly just caller, and throw QJ.
In late position raise with 3 hand to steal the blinds, if you are paid even when you have something to defend yourself.
If someone has already opened the pot raising, these hands are mostly a throw.
If someone has already opened the pot Callant simply, you can play them.
Of course, this is only theory. It does not always play the same way, if your opponent will soon know what you're doing. It also depends on the quality of the table (tight or loose, aggressive or passive)