Internal Combustion Engines The mechanical efficiency (ηm) of the engine is given by ηm = B.P/I.P ηm = I.P/B.P ηm = (B.P × I.P)/100 None of these ηm = B.P/I.P ηm = I.P/B.P ηm = (B.P × I.P)/100 None of these 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 = [(W - S) πDN]/60 watts P = (Wl × 2πN)/60 watts All of these P = [(W - S) π (D + d) N]/60 watts P = [(W - S) πDN]/60 watts P = (Wl × 2πN)/60 watts ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines A diesel engine has 1 valve 3 valves 4 valves 2 valves 1 valve 3 valves 4 valves 2 valves ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The knocking in spark ignition engines can be reduced by Increasing the engine speed Both (A) and (B) Retarding the spark None of these Increasing the engine speed Both (A) and (B) Retarding the spark None of these 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 - (1/rγ - 1) None of these 1 + rγ - 1 1 - rγ - 1 1 - (1/rγ - 1) None of these 1 + rγ - 1 1 - rγ - 1 ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The brake power of a diesel engine, keeping other parameters constant, can be increased by Increasing the temperature of intake air Decreasing the pressure of intake air Decreasing the density of intake air Increasing the pressure of intake air Increasing the temperature of intake air Decreasing the pressure of intake air Decreasing the density of intake air Increasing the pressure of intake air ANSWER DOWNLOAD EXAMIANS APP
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