A fuel sample is prepared by mixing 70% iso-octane and 30% n-heptane by volume. What is the octane number assigned to this specific fuel blend?
Q1. A fuel sample is prepared by mixing 70% iso-octane and 30% n-heptane by volume. What is the octane number assigned to this specific fuel blend?
Answer: 70
Explanation: Octane number equals the percentage of iso-octane. 30 is wrong because it represents the n-heptane percentage, not the rating.