The normal heptane (C7H16) is given a rating of ________ octane number.

A. 0

B. 50

C. 100

D. 120

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  1. In a four stroke cycle diesel engine, the exhaust valve
  2. Diesel fuel, compared to petrol is
  3. Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression…
  4. Solid fuel fabricated into various small shapes, which are assembled to form fuel elements, is in the…
  5. The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be
  6. The working pressure and temperature inside the cylinder of an internal combustion engine is _________…
  7. The reference fuels for knock rating of spark ignition engines would include
  8. For the same compression ratio
  9. The ratio of the indicated thermal efficiency to the air standard efficiency is known as
  10. In a four stroke cycle engine, the sequence of operations is
  11. The rating of a diesel engine, with increase in air inlet temperature, will
  12. Which of the following statement is wrong?
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  14. The increase of cooling water temperature in petrol engine will __________ the knocking tendency.
  15. In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the
  16. In a typical medium speed 4-stroke cycle diesel engines
  17. In order to eliminate knocking in compression ignition engines, there should be
  18. Supercharging is the process of
  19. Air fuel ratio for idling speed of a petrol engine is approximately
  20. The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called
  21. In the crankcase method of scavenging, the air pressure is produced by
  22. The theoretically correct mixture of air and petrol is
  23. The cetane number of diesel oil, generally available, is
  24. A two stroke cycle engine gives ________ the number of power strokes as compared to the four stroke…
  25. If the intake air temperature of I.C. engine increases, its efficiency will
  26. The spark ignition engines are governed by
  27. The specific fuel consumption per B.P. hour for a petrol engine is about
  28. An engine indicator is used to determine the following
  29. Which of the following statement is correct?
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