_____________ prohibits the use of alcohols directly in petrol engines ?
Correct answer: B. High cost & availability
- A. Low octane number
- B. High cost & availability
- C. Low flash point
- D. Low calorific value
Explanation
Alcohol fuels have useful antiknock properties, but their direct use is limited mainly by relatively high cost and inadequate availability for large-scale supply. Their lower calorific value is a disadvantage, but it is not the principal restriction stated here.
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