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The knock characteristics of fuel is indicated by ____________

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in Farm Machinery by (38.9k points)
The knock characteristics of fuel is indicated by ____________

(a) Cetane number

(b) Octane number

(c) Calorific value

(d) Fuel consumption

This question was posed to me in an interview for internship.

Question is from Fuel Supply System in Ignition or Diesel Engine in portion Ignition and Power Transmission of Farm Machinery

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Correct option is (b) Octane number

The best I can explain: Octane number is the calculation of knock characteristics of a fuel. The percentage of C8H18 in the reference fuel consisting of a mixture of iso-octane and normal heptane C7H16 when is produces the same knocking effect as the fuel under test is called octane number.

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