Internal Combustion Engines The knocking tendency in spark ignition engines may be decreased by Controlling the air-fuel mixture Controlling the ignition timing Reducing the compression ratio Controlling the exhaust temperature Controlling the air-fuel mixture Controlling the ignition timing Reducing the compression ratio Controlling the exhaust temperature ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The higher combustion chamber wall temperature in compression ignition engines will _________ knocking tendency. Increase None of these Reduce Not effect Increase None of these Reduce Not effect ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The basic requirement of a good combustion chamber is Low compression ratio Low volumetric efficiency Minimum turbulence High thermal efficiency and power output Low compression ratio Low volumetric efficiency Minimum turbulence High thermal efficiency and power output ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The pressure at the end of compression in the case of diesel engine is of the order of 6 kg/cm 20 kg/cm 35 kg/cm 12 kg/cm 6 kg/cm 20 kg/cm 35 kg/cm 12 kg/cm ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The mechanical efficiency (ηm) of the engine is given by None of the listed here ηm = (B.P × I.P)/100 ηm = I.P/B.P ηm = B.P/I.P None of the listed here ηm = (B.P × I.P)/100 ηm = I.P/B.P ηm = B.P/I.P ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The minimum cranking speed in case of petrol engine is about 60 - 80 rpm 250 - 300 rpm Half the operating speed One fourth of operating speed 60 - 80 rpm 250 - 300 rpm Half the operating speed One fourth of operating speed ANSWER DOWNLOAD EXAMIANS APP
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