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 - (1/rγ - 1) None of these 1 + rγ - 1 1 - rγ - 1 1 - (1/rγ - 1) None of these 1 + rγ - 1 ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines A higher compression ratio causes Increase in detonation Acceleration in the rate of combustion Pre-ignition Any one of these Increase in detonation Acceleration in the rate of combustion Pre-ignition Any one of these ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Detonation is harmful due to Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine High intensity of knock causes crankshaft vibration and the engine runs rough None of these Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine High intensity of knock causes crankshaft vibration and the engine runs rough None of these Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Antiknock for compression ignition engines is Tetra ethyl lead Amyl nitrate Hexadecane Napthene Tetra ethyl lead Amyl nitrate Hexadecane Napthene ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The size of inlet valve of an engine in comparison to exhaust valve is More Less Same More/less depending on capacity of engine More Less Same More/less depending on capacity of engine ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines A diesel engine has 4 valves 1 valve 3 valves 2 valves 4 valves 1 valve 3 valves 2 valves ANSWER DOWNLOAD EXAMIANS APP
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