1. Mechanical Engineering
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  3. In a S.I. engine, when most economical m...
Q.

In a S.I. engine, when most economical mixture is supplied, the colour of exhaust flame is expected to be

A. Yellow-red to red
B. Dark red
C. Bluish, transparent
D. Dark blue to reddish-yellow
E. Colour of exhaust flame has nothing to do with the mixture composition
Answer» D. Dark blue to reddish-yellow
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