Testing of the knocking characteristics of petrofuels is done in a _________________ engine ?
Correct answer: B. CFR (Co-operative fuel research)
- A. Carnot
- B. CFR (Co-operative fuel research)
- C. Stirling
- D. Diesel
Explanation
Knocking quality is measured in a standardized Cooperative Fuel Research engine, commonly called a CFR engine. Its controlled test conditions allow fuels to be assigned octane or cetane ratings.
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