The most difficult oil riddles

A list of oil related questions that are most often answered incorrectly
Industry quiz
Where is the headquarters of OPEC?
in Riyadh
in Dubai
in Caracas
in Vienna
OPEC was created in 1960 with headquarters in Geneva, Switzerland. It moved to Vienna, Austria in 1965.
Correct this question
Correct this question
Very interesting!
Austria riddles
Play and see more questions
Industry quiz