Internal Combustion Engines In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will _________ the knocking tendency. None of these Not effected Increase Decrease None of these Not effected Increase Decrease ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The ratio of the indicated thermal efficiency to the air standard efficiency is known as Volumetric efficiency Overall efficiency Mechanical efficiency Relative efficiency Volumetric efficiency Overall efficiency Mechanical efficiency Relative efficiency ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines In a four stroke cycle petrol engine, the inlet valve Opens at 20° after top dead center and closes at 20° before bottom dead center Opens at top dead center and closes at bottom dead center Opens at 20° before top dead center and closes at 40° after bottom dead center May open or close anywhere Opens at 20° after top dead center and closes at 20° before bottom dead center Opens at top dead center and closes at bottom dead center Opens at 20° before top dead center and closes at 40° after bottom dead center May open or close anywhere ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Scavenging air in diesel engine means Forced air for cooling cylinder Air used for forcing burnt gases out of engine's cylinder during the exhaust period Burnt air containing products of combustion Air used for combustion sent under pressure Forced air for cooling cylinder Air used for forcing burnt gases out of engine's cylinder during the exhaust period Burnt air containing products of combustion Air used for combustion sent under pressure ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The ignition quality of diesel oil is expressed by Calorific value None of the listed here Cetane number Octane number Calorific value None of the listed here Cetane number Octane number ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The minimum cranking speed in case of petrol engine is about 60 - 80 rpm One fourth of operating speed 250 - 300 rpm Half the operating speed 60 - 80 rpm One fourth of operating speed 250 - 300 rpm Half the operating speed ANSWER DOWNLOAD EXAMIANS APP
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