Internal Combustion Engines If Vâ‚ is the jet velocity and Vâ‚€ is the vehicle velocity, then the propulsive efficiency of a rocket is given by (Vâ‚€/Vâ‚)/ [1 + (Vâ‚€/Vâ‚)²] Vâ‚€/(Vâ‚€ + Vâ‚) [2(Vâ‚€/Vâ‚)]/ [1 + (Vâ‚€/Vâ‚)²] Vâ‚/(Vâ‚€ + Vâ‚) (Vâ‚€/Vâ‚)/ [1 + (Vâ‚€/Vâ‚)²] Vâ‚€/(Vâ‚€ + Vâ‚) [2(Vâ‚€/Vâ‚)]/ [1 + (Vâ‚€/Vâ‚)²] Vâ‚/(Vâ‚€ + Vâ‚) ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines The size of inlet valve of an engine in comparison to exhaust valve is Same Less More More/less depending on capacity of engine Same Less More More/less depending on capacity of engine ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines A petrol engine has compression ratio from 15 to 25 10 to 15 25 to 40 6 to 10 15 to 25 10 to 15 25 to 40 6 to 10 ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Iso-octane (C₈H₁₈) has octane number of 100 50 120 0 100 50 120 0 ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines Detonation is harmful due to None of these Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls High intensity of knock causes crankshaft vibration and the engine runs rough None of these Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls High intensity of knock causes crankshaft vibration and the engine runs rough ANSWER DOWNLOAD EXAMIANS APP
Internal Combustion Engines In a petrol engine, if diesel is used, then the engine will Run more efficiently Run at high speed Not run Explode Run more efficiently Run at high speed Not run Explode ANSWER DOWNLOAD EXAMIANS APP
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