Question:
Ethanol preferred as fuel due to its cetane number is
Ethanol preferred as fuel due to its cetane number is
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Ethanol has high Octane (anti-knock) but very low Cetane (ignition quality).
Updated On: May 5, 2026
- 8
- 18
- 28
- 38
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The Correct Option is A
Solution and Explanation
Step 1: Concept
Cetane number measures the ignition delay of a fuel in a compression-ignition (diesel) engine.
Step 2: Meaning
Ethanol is high in octane (good for petrol engines) but very low in cetane.
Step 3: Analysis
Pure ethanol has a very low cetane number, typically around 8. This makes it difficult to use in standard diesel engines without additives or modifications.
Step 4: Conclusion
The cetane number of ethanol is 8.
Final Answer: (A)
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