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 None of these 1 + rγ - 1 1 - (1/rγ - 1) 1 - rγ - 1 None of these 1 + rγ - 1 1 - (1/rγ - 1) ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The thermal efficiency of diesel engines is about 0.7 0.5 0.15 0.3 0.7 0.5 0.15 0.3 ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines A higher compression ratio causes Increase in detonation Pre-ignition Any one of these Acceleration in the rate of combustion Increase in detonation Pre-ignition Any one of these Acceleration in the rate of combustion ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The knocking tendency in compression ignition engines for a given fuel will be Enhanced by decreasing compression ratio None of these Enhanced by increasing compression ratio Dependent on other factors Enhanced by decreasing compression ratio None of these Enhanced by increasing compression ratio Dependent on other factors ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The octane number of petrol, generally available, is 20 to 40 60 to 80 80 to 100 40 to 60 20 to 40 60 to 80 80 to 100 40 to 60 ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is More Less or more depending on operating conditions Same Less More Less or more depending on operating conditions Same Less ANSWER DOWNLOAD EXAMIANS APP
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