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 knocking tendency in compression ignition engines for a given fuel will be Enhanced by increasing compression ratio None of these Dependent on other factors Enhanced by decreasing compression ratio Enhanced by increasing compression ratio None of these Dependent on other factors Enhanced by decreasing compression ratio ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Which of the following is false statement?Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following Formation of hard coating on piston skirts Piston ring and cylinder wear Oil sludge in the engine crank case Detonation Formation of hard coating on piston skirts Piston ring and cylinder wear Oil sludge in the engine crank case Detonation ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines As compared to air standard cycle, in actual working, the effect of variation in specific heats is to Increase maximum pressure and maximum temperature Reduce maximum pressure and maximum temperature Increase maximum pressure and decrease maximum temperature Decrease maximum pressure and increase maximum temperature Increase maximum pressure and maximum temperature Reduce maximum pressure and maximum temperature Increase maximum pressure and decrease maximum temperature Decrease maximum pressure and increase maximum temperature ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines If V₁ is the jet velocity and V₀ is the vehicle velocity, then propulsive efficiency of a turbojet engine is 2V₁ / (V₀ + V₁) 2V₀ / (V₀ + V₁) V₀ / (V₀ + V₁) V₁ / (V₀ + V₁) 2V₁ / (V₀ + V₁) 2V₀ / (V₀ + V₁) V₀ / (V₀ + V₁) V₁ / (V₀ + V₁) ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Gaseous fuel guarantees are based on High heat value of oil Low heat value of oil Calorific value of oil Mean heat value of oil High heat value of oil Low heat value of oil Calorific value of oil Mean heat value of oil ANSWER DOWNLOAD EXAMIANS APP
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