Flash point of fuel oil is Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame Temperature at which it catches fire without external aid Indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off Temperature at which it solidifies or congeals TRUE ANSWER : ? YOUR ANSWER : ?
The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is Less Same More More or less depending on power rating TRUE ANSWER : ? YOUR ANSWER : ?
Detonation is harmful due to Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine High intensity of knock causes crankshaft vibration and the engine runs rough None of these TRUE ANSWER : ? YOUR ANSWER : ?
The method of determination of indicated power of a multi cylinder spark ignition engine is by the use of Prony brake test Morse test Heat balance test Motoring test TRUE ANSWER : ? YOUR ANSWER : ?
The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is Same Less More Less or more depending on operating conditions TRUE ANSWER : ? YOUR ANSWER : ?
The thermal efficiency of diesel engines on weak mixtures is Dependent on other factors Higher Unaffected Lower TRUE ANSWER : ? YOUR ANSWER : ?
The cetane (Câ‚₆H₃₄) which is a straight chain paraffin, is assigned a cetane number of 50 100 120 TRUE ANSWER : ? YOUR ANSWER : ?
The air-fuel ratio of the petrol engine is controlled by Governor Carburettor Fuel pump Injector TRUE ANSWER : ? YOUR ANSWER : ?
The pressure inside the cylinder is _________ the atmospheric pressure during the exhaust stroke. Below None of these Above Equal to TRUE ANSWER : ? YOUR ANSWER : ?
In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of 1000°C 250°C 500°C 2000°C TRUE ANSWER : ? YOUR ANSWER : ?