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31.

In a S.I. engine, if the colour of exhaust flame is bluish, transparent, it indicates that the mixture supplied to the engine is

32.

In S.I. engine if the spark plug deposit indicates black coating of soot, it therefore indicates that the engine has been generally operating on

33.

In a S.I. engine burned white deposit on spark plug with molten globules indicates that the engine has been generally operating on

34.

Too rich mixture for a S.I. engine means air : fuel ratio of about

35.

In an internal combustion engine the approximate percentage of the combustion heat that passes to the cylinder walls is

36.

Commonly used antifeeze solution in automobiles is

37.

In cars a temperature indicating instrument is usually provided which indicates the temperature of

A.	Engine piston	B.	Engine cylinder
C.	Lubricating oil	D.	Jacket cooling water
E.	Air surrounding engine cylinders

38.

At the first sight a petrol engine is identified by

39.

Which part is not common between the petrol and diesel engines

40.

In which case the air fuel ratio is expected to be the highest?