Internal Combustion Engines The exhaust valve in a four stroke cycle petrol engine Opens at 50° before bottom dead center and closes at 15° after top dead center 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 May open and close anywhere Opens at 50° before bottom dead center and closes at 15° after top dead center 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 May open and close anywhere ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines If the intake air temperature of I.C. engine increases, its efficiency will Increase Decrease None of these Remain same Increase Decrease None of these Remain same ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The basic requirement of a good combustion chamber is Low compression ratio Minimum turbulence Low volumetric efficiency High thermal efficiency and power output Low compression ratio Minimum turbulence Low volumetric efficiency High thermal efficiency and power output 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 12 kg/cm 35 kg/cm 20 kg/cm 6 kg/cm 12 kg/cm 35 kg/cm 20 kg/cm 6 kg/cm ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines If Vâ‚ is the jet velocity and Vâ‚€ is the vehicle velocity, then the propulsive efficiency of a rocket is given by [2(Vâ‚€/Vâ‚)]/ [1 + (Vâ‚€/Vâ‚)²] Vâ‚/(Vâ‚€ + Vâ‚) (Vâ‚€/Vâ‚)/ [1 + (Vâ‚€/Vâ‚)²] Vâ‚€/(Vâ‚€ + Vâ‚) [2(Vâ‚€/Vâ‚)]/ [1 + (Vâ‚€/Vâ‚)²] Vâ‚/(Vâ‚€ + Vâ‚) (Vâ‚€/Vâ‚)/ [1 + (Vâ‚€/Vâ‚)²] Vâ‚€/(Vâ‚€ + Vâ‚) ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines In a typical medium speed 4-stroke cycle diesel engine the inlet valve Opens at top dead center and closes at bottom dead center Opens at 20° before top dead center and closes at 35° after the bottom dead center Opens at 10° after top dead center and closes 20° before the bottom dead center May open or close anywhere Opens at top dead center and closes at bottom dead center Opens at 20° before top dead center and closes at 35° after the bottom dead center Opens at 10° after top dead center and closes 20° before the bottom dead center May open or close anywhere ANSWER DOWNLOAD EXAMIANS APP
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