Since no one has taken the quiz in quite some time I shall now post the answers. Congratulations to Flamestryke for getting the best score. Answers shall be posted in green and comments in red.
NPC's:
1) Which NPC has the Chieftain's Scepter? (2 pts)
Chief Gari
2) How many NPC's can ask you to rob the Arnika bank? (2 pts)
2. Myles and Rattus Rattus.
3) What creatures does Burz summon? (3 pts)
Oak spirits.
4) If you have a character called XYZ, then what shall your offspring be called when meeting the Rapax army on Ascension Peak? (2 pts)
Al-XYZ
5) Why won't any RPC's willingly enter the Rapax Away Camp with the group? (2 pts)
Because you need two empty slots to get Rodan and Drazic.
But Flamestryke told me that Glumph actually enters. And Wereboar told me that Rodan and Drazic also enter. I should have added a comment about that second one. 
Monsters:
6) How many crabs are next to the chest on the beach next to the monestary when you start the game? (1 pt)
3
7) In which version of Wizardry 8 was there a swallower where now Gregor is? (3 pts)
The demo.
8) Which of these two is undead: vampire bat or bat vampire? (2 pts)
Bat vampire.
9) What is Z'Ant's fire resistance? (3 pts)
100 %
10) In the demo version of Wizardry 8 what creatures could you encounter in the room of the monestary which has 3 sarcophaguses on each side? (3 pts)
Higardi Spirits.
Items:
11) What is the weight of 15 Impaling Stones? (1 pt)
0.5 each so 7.5 total.
12) Name a weapon only a faerie ninja can use. (2 pts)
Cane of Corpus
13) Which character class can use this item: Ring of the Road? (2 pts)
Bard
14) Name three items found behind the waterfall in the Mountain Wilderness. (1 pt for each)
Among others Staff of Doom, Diamond Eyes and
15) What condition triggers the ascension peak landslide? (2 pts)
Entering Ascension Peak with two or more of the Artifacts in inventory
Misc questions:
16) Who stole which powerful artifact from the monestary? (2 pts)
Marten stole the Destinae Dominus
17) How many possible endings does the game have (not counting death of party and such, just endings where you are victorious). (2 pts)
3
18) In the game peace can be achieved between which two races? (2 pts)
Umpani and T'Rang
19) How many experience does a bishop need to make level 2? (1 pt)
1600
20) Where can you find a giant bat in the game? (2 pts)
Upper Trynton boughs. It is flying around there somewhere.