Internal Combustion Engines Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to Cylinder walls being too hot Red hot carbon deposits on cylinder walls Any one of the listed here Overheated spark plug points Cylinder walls being too hot Red hot carbon deposits on cylinder walls Any one of the listed here Overheated spark plug points ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The mechanical efficiency (ηm) of the engine is given by None of the listed here ηm = I.P/B.P ηm = (B.P × I.P)/100 ηm = B.P/I.P None of the listed here ηm = I.P/B.P ηm = (B.P × I.P)/100 ηm = B.P/I.P ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Compression ratio of I.C. Engines is Volume displaced by piston per stroke and clearance volume in cylinder Swept volume/cylinder volume The ratio of volumes of air in cylinder before compression stroke and after compression stroke Ratio of pressure after compression and before compression Volume displaced by piston per stroke and clearance volume in cylinder Swept volume/cylinder volume The ratio of volumes of air in cylinder before compression stroke and after compression stroke Ratio of pressure after compression and before compression 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 Which of the following fuel detonates readily? Alcohol Benzene Iso-octane Normal heptane Alcohol Benzene Iso-octane Normal heptane ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Scavenging air in diesel engine means Forced air for cooling cylinder Burnt air containing products of combustion Air used for forcing burnt gases out of engine's cylinder during the exhaust period Air used for combustion sent under pressure Forced air for cooling cylinder Burnt air containing products of combustion Air used for forcing burnt gases out of engine's cylinder during the exhaust period Air used for combustion sent under pressure ANSWER DOWNLOAD EXAMIANS APP
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