HomeEngineeringIf the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on 98. If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating onBy Admin / September 13, 2025 too lean mixture stoichiometric mixture most economical mixture too rich mixture ✅ The correct answer is option D.
1. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm². Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin
2. Transformer cores are normally made from Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin