Railways Technical Ability Internal Combustion Engine (ICE) Question Bank Internal Combustion Engine (ICE)

  • question_answer Which of the following are the assumptions involved in the auto-ignition theory put forth for the onset of knock in SI engines?
    1. Flame velocity is normal before the onset of auto ignition.
    2. A number of end-gas elements auto ignite simultaneously.
    3. Preflame reactions are responsible for preparing the end-gas to ignite.
    Select the correct answer using the codes given below:

    A) 1 and 2            

    B) 1 and 3

    C) 2 and 3            

    D) 1, 2 and 3

    Correct Answer: D


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