No, you got it all wrong!
First set of questions...
What is your name?
What is your quest? (to find the holy grail)
What is you favourite color? (first guy: blue. passes. second guy: blue. no wait! AaAaAh! *is launched off bridge and falls to his death)
Second set...
What is your name? (King Arthur of the Britons)
What is your quest? (To find the Holy Grail)
What is the airspeed velocity of an unladen swallow? (What, an african or a european swallow? Bridgekeeper: What? I don't know that! AaAaAh! *dies*)