Internal Combustion Engines The reference fuels for knock rating of spark ignition engines would include Normal octane and aniline Normal heptane and iso-octane Iso-octane and alpha-methyl naphthalene Iso-octane and normal hexane Normal octane and aniline Normal heptane and iso-octane Iso-octane and alpha-methyl naphthalene Iso-octane and normal hexane ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The cetane number of diesel oil, generally available, is 20 to 25 30 to 40 25 to 30 40 to 55 20 to 25 30 to 40 25 to 30 40 to 55 ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The ignition of the charge by some hot surface within the engine before the passage of spark is called Auto-ignition Detonation Ignition delay Pre-ignition Auto-ignition Detonation Ignition delay Pre-ignition ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The increase of cooling water temperature in petrol engine will _________ the knocking tendency. Not effect Increase None of these Decrease Not effect Increase None of these Decrease ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The exhaust valve in a four stroke cycle petrol engine Opens at 50° after bottom dead center and closes at 15° before top dead center Opens at bottom dead center and closes at top dead center Opens at 50° before bottom dead center and closes at 15° after top dead center May open and close anywhere Opens at 50° after bottom dead center and closes at 15° before top dead center Opens at bottom dead center and closes at top dead center Opens at 50° before bottom dead center and closes at 15° after top dead center May open and close anywhere ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Diesel as compared to petrol is Highly ignitable More difficult to ignite None of these Less difficult to ignite Highly ignitable More difficult to ignite None of these Less difficult to ignite ANSWER DOWNLOAD EXAMIANS APP
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