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Alcohols are unsuitable as diesel engine fuels because
  • a)
    The cetane number of alcohol fuels is very low, which prevents their ignition by compression
  • b)
    The cetane number of alcohol fuels is very high, which prevents their ignition by compression
  • c)
    The cetane number of alcohol fuels is zero
  • d)
    None of these
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Alcohols are unsuitable as diesel engine fuels becausea)The cetane nu...
In diesel engines, the self-ignition of the fuel happens due to compression. This is due to lower ignition delay, i.e., the time between rise in temperature and commencement of combustion.
This ability for self-ignition under compression is better expressed as cetane number. This is where alcohol lacks, having a very low cetane number and hence poor ignition upon compression.
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Alcohols are unsuitable as diesel engine fuels becausea)The cetane number of alcohol fuels is very low, which prevents their ignition by compressionb)The cetane number of alcohol fuels is very high, which prevents their ignition by compressionc)The cetane number of alcohol fuels is zerod)None of theseCorrect answer is option 'A'. Can you explain this answer?
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