The knock in diesel engine occurs due to

A. Instantaneous and rapid burning of the first part of the charge

B. Instantaneous auto ignition of last part of charge

C. Delayed burning of the first part of the charge

D. Reduction of delay period

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  1. Stoichiometric ratio is
  2. The specific fuel consumption per B.P. hour for a diesel engine is about
  3. In a coil ignition system of petrol engines, a condenser is connected across the contact breaker in…
  4. For the same compression ratio
  5. Most high speed compression engines operate on
  6. The reference fuels for knock rating of spark ignition engines would include
  7. If the intake air temperature of I.C. engine increases, its efficiency will
  8. The knocking tendency in spark ignition engines may be decreased by
  9. In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the
  10. Which one of the following event would reduce volumetric efficiency of a vertical compression ignition…
  11. In order to eliminate knocking in compression ignition engines, there should be
  12. The operation of forcing additional air under pressure into the engine cylinder is known as
  13. The self ignition temperature of petrol is ________ as compared to diesel oil.
  14. If V₁ is the jet velocity and V₀ is the vehicle velocity, then the propulsive efficiency…
  15. Which of the following does not relate to a compression ignition engine?
  16. By higher octane number of spark ignition fuel, it is meant that the fuel has
  17. Which of the following is the lightest and most volatile liquid fuel?
  18. The process of breaking up or a liquid into fine droplets by spraying is called
  19. The reason for supercharging in any engine is to
  20. A 5 BHP engine running at full load would consume diesel of the order of
  21. Diesel engine can work on very lean air fuel ratio of the order of 30: 1. A petrol engine can also work…
  22. A mixture containing 65% of iso-octane and 35% of normal heptane will have
  23. The octane number of petrol, generally available, is
  24. Scavenging air in diesel engine means
  25. The two reference fuels used for cetane rating are
  26. All heat engines utilize
  27. The air-fuel ratio of the petrol engine is controlled by
  28. Which of the following statements is correct?
  29. A carburettor is used to supply
  30. The theoretically correct air fuel ratio for petrol engine is of the order of