11.Gaseous-fuel guarantees are based on

12.The cam shaft of a four stroke I.C. engine running at 1500 rmp will run at

13.Polymerisation is a chemical process in which molecules of a compound become

14.The fuel air ratio in a petrol engine fitted with suction carburetor, operating with dirty air filter as compared to clean filter will be

15.Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads