Internal Combustion Engines Diesel engine can work on very lean air fuel ratio of the order of 30: 1. A petrol engine can also work on such a lean ratio provided It is properly designed Cannot work as it is impossible Flywheel size is proper Best quality fuel is used It is properly designed Cannot work as it is impossible Flywheel size is proper Best quality fuel is used ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The air standard efficiency of an I.C. engine is given by (where r = Compression ratio, and γ = Ratio of specific heats) 1 - rγ - 1 1 + rγ - 1 None of these 1 - (1/rγ - 1) 1 - rγ - 1 1 + rγ - 1 None of these 1 - (1/rγ - 1) ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The working pressure and temperature inside the cylinder of an internal combustion engine is _________ as compared to a steam engine. High Very low Low Very high High Very low Low Very high ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The output of a diesel engine can be increased without increasing the engine revolution or size in following way Heating incoming air Scavenging Feeding more fuel Supercharging Heating incoming air Scavenging Feeding more fuel Supercharging ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The accumulation of carbon in a cylinder results in increase of Volumetric efficiency Ignition time Clearance volume Effective compression ratio Volumetric efficiency Ignition time Clearance volume Effective compression ratio ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines A higher compression ratio causes Acceleration in the rate of combustion Increase in detonation Any one of these Pre-ignition Acceleration in the rate of combustion Increase in detonation Any one of these Pre-ignition ANSWER DOWNLOAD EXAMIANS APP
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