Question

The efficiency of a fuel is measured in terms of:

• A. octane number
• B. butane number
• C. hexane number
• D. methane number

Answer 1

The correct option is A octane number

Octane number is a standard measure of performance of an engine or aviation fuel. The higher the octane number the more compression the fuel can withstand before igniting. Fuels with higher octane number are gasoline engines and fuels with lower octane number are diesel engines.