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) None of these 1 - rγ - 1 1 - (1/rγ - 1) 1 + rγ - 1 None of these 1 - rγ - 1 1 - (1/rγ - 1) 1 + rγ - 1 ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines A petrol engine, during suction stroke draws None of these A mixture of petrol and air Petrol only Air only None of these A mixture of petrol and air Petrol only Air only ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines If the ratios of all the corresponding linear dimensions are equal, then the model and the prototype are said to have None of these Kinematic similarity Geometric similarity Dynamic similarity None of these Kinematic similarity Geometric similarity Dynamic similarity ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Air fuel ratio at which a petrol engine cannot work is 0.41736111111111 0.33402777777778 20 : 1 and less 0.62569444444444 0.41736111111111 0.33402777777778 20 : 1 and less 0.62569444444444 ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The _________ engines can work on very lean mixture of fuel. Both (A) and (B) Spark ignition None of these Compression ignition Both (A) and (B) Spark ignition None of these Compression ignition ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines In a typical medium speed 4-stroke cycle diesel engines May open and close anywhere Exhaust valve opens at 35° before bottom dead center and closes at 20° after top dead center Exhaust valve opens just after bottom dead center and closes just before top dead center Exhaust valve opens at bottom dead center and closes at top dead center May open and close anywhere Exhaust valve opens at 35° before bottom dead center and closes at 20° after top dead center Exhaust valve opens just after bottom dead center and closes just before top dead center Exhaust valve opens at bottom dead center and closes at top dead center ANSWER DOWNLOAD EXAMIANS APP
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