Internal Combustion Engines The maximum propulsive efficiency of a turbojet engine is at a speed of 1000 km/h 2000 km/h 3000 km/h 2400 km/h 1000 km/h 2000 km/h 3000 km/h 2400 km/h ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines In a typical medium speed 4-stroke cycle diesel engines May open and close anywhere Exhaust valve opens at 35° before bottom dead center and closes at 20° after top dead center Exhaust valve opens just after bottom dead center and closes just before top dead center Exhaust valve opens at bottom dead center and closes at top dead center May open and close anywhere Exhaust valve opens at 35° before bottom dead center and closes at 20° after top dead center Exhaust valve opens just after bottom dead center and closes just before top dead center Exhaust valve opens at bottom dead center and closes at top dead center 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 Cause more rapid break of the primary current, giving a higher voltage in the secondary circuit Prevent sparking across the gap between the points Both (A) and (B) None of these Cause more rapid break of the primary current, giving a higher voltage in the secondary circuit Prevent sparking across the gap between the points ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time is called Volumetric efficiency Indicated thermal efficiency Overall efficiency Mechanical efficiency Volumetric efficiency Indicated thermal efficiency Overall efficiency Mechanical efficiency ANSWER DOWNLOAD EXAMIANS APP
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 1 - (1/rγ - 1) 1 - rγ - 1 None of these 1 + rγ - 1 1 - (1/rγ - 1) 1 - rγ - 1 None of these ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines In a four stroke cycle petrol engine, the compression Starts at bottom dead centre and ends at top dead centre May start and end anywhere Starts at 40° before bottom dead centre and ends at 30° after bottom dead centre Starts at 40° after bottom dead centre and ends at 30° before top dead centre Starts at bottom dead centre and ends at top dead centre May start and end anywhere Starts at 40° before bottom dead centre and ends at 30° after bottom dead centre Starts at 40° after bottom dead centre and ends at 30° before top dead centre ANSWER DOWNLOAD EXAMIANS APP
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