What do the Prologue questions in Canterbury tales consist of?

All of the various travelers are going to Canterbury to visit the shrine of St. Thomas a Becket, the archbishop who was killed on thesteps of the cathedral over a misunderstanding from the king to some of his knights. The travelers are going for various reasons: the knight to give a prayer of thanks for his victories, the religious to see the cathedral itself, and the other pilgrims for all the reasons that pilgrimages might be taken. They meet at the tavern of Harry Bailey who proposes a story telling contest which then generates the tales which comprise the rest of the work. The prologue is really a compendium of life in the medieval world of Chaucer's time.

I'm not exactly sure what you mean by "questions" but hopefully this helps a little,

The basic structure of the work, as established in the General Prologue, is simple enough and relatively conventional. A group of travelers are thrown together and, to pass the time, they determine to tell each other stories (in a manner common to all sorts of narratives like the Thousand and One Nights, The Decameron of Boccaccio, and so on). Chaucer chooses one of the oldest narrative devices, a journey, in this case a pilgrimage which includes a wide variety of social types. On this familiar narrative framework, he then hangs a series of tales in which he can display a number of different literary forms (fairy stories, prose sermons, romance narratives, bawdy tales, animal fables, and so on). In this way, he has a ready-made recipe for a wide variety of personalities and stories. And one of the greatest achievements of The Canterbury Tales is the richness of it characters and its literary styles.