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 pressure inside the cylinder is _________ the atmospheric pressure during the exhaust stroke. None of these Above Equal to Below None of these Above Equal to Below ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be 0.04 0.02 0.08 0.14 0.04 0.02 0.08 0.14 ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed 120°C 180°C 240°C 80°C 120°C 180°C 240°C 80°C ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Number of working strokes per min. for a two stroke cycle engine is ____ the speed of the engine in r.p.m. Twice Equal to Four-times One-half Twice Equal to Four-times One-half ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines In a four stroke cycle petrol engine, the compression Starts at bottom dead centre and ends at top dead centre Starts at 40° after bottom dead centre and ends at 30° before top dead centre May start and end anywhere Starts at 40° before bottom dead centre and ends at 30° after bottom dead centre Starts at bottom dead centre and ends at top dead centre Starts at 40° after bottom dead centre and ends at 30° before top dead centre May start and end anywhere Starts at 40° before bottom dead centre and ends at 30° after bottom dead centre ANSWER DOWNLOAD EXAMIANS APP
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