Internal Combustion Engines The reference fuels for knock rating of spark ignition engines would include Normal heptane and iso-octane Iso-octane and alpha-methyl naphthalene Normal octane and aniline Iso-octane and normal hexane Normal heptane and iso-octane Iso-octane and alpha-methyl naphthalene Normal octane and aniline Iso-octane and normal hexane ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The higher combustion chamber wall temperature in compression ignition engines will _________ knocking tendency. None of these Reduce Increase Not effect None of these Reduce Increase Not effect ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines In a four stroke cycle petrol engine, the expansion Starts at 30° after top dead center and ends at 50° after bottom dead center Starts at 30° before top dead center and ends at 50° before bottom dead center May start and end anywhere Starts at top dead center and ends at bottom dead center Starts at 30° after top dead center and ends at 50° after bottom dead center Starts at 30° before top dead center and ends at 50° before bottom dead center May start and end anywhere Starts at top dead center and ends at bottom dead center 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) All of these P = [(W - S) π (D + d) N]/60 watts P = (Wl × 2πN)/60 watts P = [(W - S) πDN]/60 watts All of these P = [(W - S) π (D + d) N]/60 watts P = (Wl × 2πN)/60 watts P = [(W - S) πDN]/60 watts ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The maximum propulsive efficiency of a turbojet engine is at a speed of 2400 km/h 2000 km/h 3000 km/h 1000 km/h 2400 km/h 2000 km/h 3000 km/h 1000 km/h ANSWER DOWNLOAD EXAMIANS APP
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