Internal Combustion Engines The knocking in spark ignition engines can be reduced by Both (A) and (B) Increasing the engine speed Retarding the spark None of these Both (A) and (B) Increasing the engine speed Retarding the spark None of these ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines If the intake air temperature of I.C. engine increases, its efficiency will Remain same None of these Decrease Increase Remain same None of these Decrease Increase ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of 75% petrol and 25% diesel 75% normal heptane and 25% iso-octane 75% diesel and 25% petrol 75% iso-octane and 25% normal heptane 75% petrol and 25% diesel 75% normal heptane and 25% iso-octane 75% diesel and 25% petrol 75% iso-octane and 25% normal heptane ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The fuel valve in a four stroke cycle diesel engine Opens at top dead center and closes at bottom dead center Opens at 15° before top dead center and closes at 20° after top dead center Opens at 15° after top dead center and closes at 20° before bottom dead center May open and close anywhere Opens at top dead center and closes at bottom dead center Opens at 15° before top dead center and closes at 20° after top dead center Opens at 15° after top dead center and closes at 20° before bottom dead center May open and close anywhere 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 0.08 0.04 0.14 0.02 0.08 0.04 0.14 0.02 ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The ratio of the indicated thermal efficiency to the air standard efficiency is known as Overall efficiency Volumetric efficiency Mechanical efficiency Relative efficiency Overall efficiency Volumetric efficiency Mechanical efficiency Relative efficiency ANSWER DOWNLOAD EXAMIANS APP
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