This quiz is all about opener's rebid after responder has bid opener's second suit. The simple question is how far should opener raise the suit?
A rule of thumb is that a minimum raise shows a minimum hand. With anything better than that you have to jump the bidding, either to a level below game (an invitational bid) or all the way to game.
Note that all raises of partner's suit are non-forcing. These examples will make it all clear, we think...