A: Yes! If you have enough space to where you would like to transfer your monsters.
For example: I'm hatching D.A.V.E.s on my main yard but I have to feed my champion, I will then use my outposts to train monsters that are needed to feed my champion and then transfer them to my main yard without interrupting my production of D.A.V.E.s. BUT, I must first give some space for these monsters by juicing some of my D.A.V.E.s or by using them on attacking other players.
Hope I helped you!