Home

The mechanical efficiency (ηm) of the engine is given by

A. ηm = B.P/I.P

B. ηm = I.P/B.P

C. ηm = (B.P × I.P)/100

D. None of these

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. The air requirement of a petrol engine during starting compared to theoretical air required for complete…
  2. High speed compression engines operate on
  3. The pressure at the end of compression, in diesel engines, is approximately
  4. Compression ratio of I.C. Engines is
  5. The output of a diesel engine can be increased without increasing the engine revolution or size in following…
  6. The minimum cranking speed in case of petrol engine is about
  7. In order to mix air and petrol in the required proportion and to supply it to the engine during suction…
  8. A fuel of cetane number 40 has the same ignition quality as a mixture of
  9. A heat engine utilises the
  10. The size of inlet valve of an engine in comparison to exhaust valve is
  11. Pour point of fuel oil is the
  12. Which is more viscous lube oil?
  13. During idling, a petrol engine requires _________ mixture.
  14. A spark plug gap is kept from
  15. The cetane number of diesel oil, generally available, is
  16. The theoretically correct mixture of air and petrol is
  17. Diesel engine can work on very lean air fuel ratio of the order of 30: 1. A petrol engine can also work…
  18. The two reference fuels used for cetane rating are
  19. Which of the following is false statement? Some of the methods used to reduce diesel smoke are as follows
  20. The ignition quality of diesel oil is expressed by
  21. Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads
  22. It the temperature of intake air in IC engines is lowered, then its efficiency will
  23. The delay period in compression ignition engines depends upon
  24. The object of supercharging the engine is
  25. Scavenging is usually done to increase
  26. Which of the following statements is correct?
  27. The thermal efficiency of a diesel cycle having fixed compression ratio, with increase in cut-off ratio…
  28. In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have
  29. The higher combustion chamber wall temperature in compression ignition engines will _________ knocking…
  30. The maximum temperature in the I.C. engine cylinder is of the order of