Internal Combustion Engines Which of the following fuel has little tendency towards detonation? Benzene Iso-octane Alcohol Normal heptane Benzene Iso-octane Alcohol Normal heptane ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Detonation is harmful due to Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls High intensity of knock causes crankshaft vibration and the engine runs rough None of these Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls High intensity of knock causes crankshaft vibration and the engine runs rough None of these Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines In a coil ignition system of petrol engines, a condenser is connected across the contact breaker in order to Both (A) and (B) None of these Prevent sparking across the gap between the points Cause more rapid break of the primary current, giving a higher voltage in the secondary circuit Both (A) and (B) None of these Prevent sparking across the gap between the points Cause more rapid break of the primary current, giving a higher voltage in the secondary circuit ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines In a four stroke cycle diesel engine, the compression Starts at 40° before top dead center and ends at 40° after top dead center May start and end anywhere Starts at top dead center and ends at 40° before bottom dead center Starts at 40° after bottom dead center and ends at 10° before top dead center Starts at 40° before top dead center and ends at 40° after top dead center May start and end anywhere Starts at top dead center and ends at 40° before bottom dead center Starts at 40° after bottom dead center and ends at 10° before top dead center ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to Inject fuel at a high velocity to facilitate atomization All of these Inject fuel in a chamber of high pressure at the end of compression stroke Ensure that penetration is not high Inject fuel at a high velocity to facilitate atomization All of these Inject fuel in a chamber of high pressure at the end of compression stroke Ensure that penetration is not high ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The pressure at the end of compression in the case of diesel engine is of the order of 35 kg/cm 12 kg/cm 20 kg/cm 6 kg/cm 35 kg/cm 12 kg/cm 20 kg/cm 6 kg/cm ANSWER DOWNLOAD EXAMIANS APP
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