Internal Combustion Engines Which of the following statement is correct regarding petrol engines? All of these The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition All of these The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines A higher compression ratio causes Acceleration in the rate of combustion Pre-ignition Increase in detonation Any one of these Acceleration in the rate of combustion Pre-ignition Increase in detonation Any one of these ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The increase of efficiency of a compression ignition engine, as the load decreases, is due to Qualitative governing Hit and miss governing Quantitative governing Higher maximum temperature Qualitative governing Hit and miss governing Quantitative governing Higher maximum temperature ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in meters, N = Speed of engine in r.p.m., S = Spring balance reading in newtons, D = Dia. of brake drum in meters, and d = Dia. of rope in meters) P = [(W - S) π (D + d) N]/60 watts All of these P = (Wl × 2πN)/60 watts P = [(W - S) πDN]/60 watts P = [(W - S) π (D + d) N]/60 watts All of these P = (Wl × 2πN)/60 watts P = [(W - S) πDN]/60 watts ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The theoretically correct mixture of air and petrol is 25 : 1 20 : 1 15 : 1 10 : 1 25 : 1 20 : 1 15 : 1 10 : 1 ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines In a four stroke cycle diesel engine, the inlet valve May open and close anywhere Opens at top dead center and closes at bottom dead center Opens at 20° after top dead center and closes at 20° before bottom dead center Opens at 20° before top dead center and closes at 40° after bottom dead center May open and close anywhere Opens at top dead center and closes at bottom dead center Opens at 20° after top dead center and closes at 20° before bottom dead center Opens at 20° before top dead center and closes at 40° after bottom dead center ANSWER DOWNLOAD EXAMIANS APP
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