Air fuel ratio at which a petrol engine cannot work is 20 : 1 and less 0.41736111111111 0.33402777777778 0.62569444444444 TRUE ANSWER : ? YOUR ANSWER : ?
The knocking in diesel engines may be prevented by Increasing the inlet pressure of air All of these Raising the compression ratio Reducing the delay period TRUE ANSWER : ? YOUR ANSWER : ?
The specific fuel consumption per BHP hour for diesel engine is approximately 0.2 kg 0.15 kg 0.3 kg 0.25 kg TRUE ANSWER : ? YOUR ANSWER : ?
The fuels in order of decreasing knock tendency for spark ignition engines are Napthene, aromatics, paraffin Paraffin, aromatic, napthene Napthene, paraffin, aromatic Paraffin, napthene, aromatic TRUE ANSWER : ? YOUR ANSWER : ?
The Cipoletti weir is a __________ weir. Rectangular Triangular Circular Trapezoidal TRUE ANSWER : ? YOUR ANSWER : ?
In a cycle, the spark lasts roughly for 0.1 sec 0.001 sec 1 sec 0.01 sec TRUE ANSWER : ? YOUR ANSWER : ?
The pressure and temperature at the end of compression stroke in a petrol engine are of the order of 20-30 kg/cm² and 450-500°C 4-6 kg/cm² and 200-250°C 6-12 kg/cm² and 250-350°C 12-20 kg/cm² and 350-450°C TRUE ANSWER : ? YOUR ANSWER : ?
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) 1 - rγ - 1 1 + rγ - 1 None of these TRUE ANSWER : ? YOUR ANSWER : ?
The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called Relative efficiency Overall efficiency Efficiency ratio Net efficiency TRUE ANSWER : ? YOUR ANSWER : ?
The output of a diesel engine can be increased without increasing the engine revolution or size in following way Feeding more fuel Scavenging Heating incoming air Supercharging TRUE ANSWER : ? YOUR ANSWER : ?