Alpha-methyl-naphthalene (C₁₁ H₁₀) has a cetane number of 120 100 0 50 TRUE ANSWER : ? YOUR ANSWER : ?
The thermal efficiency of a petrol engine is _________ as compared to diesel engine. Less More None of these Same TRUE ANSWER : ? YOUR ANSWER : ?
The brake power is the power available At the crank pin In the engine cylinder At the crank shaft None of these TRUE ANSWER : ? YOUR ANSWER : ?
In case of gas turbines, the gaseous fuel consumption guarantees are based on High heat value Calorific value Low heat value Net calorific value TRUE ANSWER : ? YOUR ANSWER : ?
The fuels in order of decreasing knock tendency for spark ignition engines are Paraffin, aromatic, napthene Paraffin, napthene, aromatic Napthene, paraffin, aromatic Napthene, aromatics, paraffin TRUE ANSWER : ? YOUR ANSWER : ?
The reference fuels for knock rating of spark ignition engines would include Iso-octane and alpha-methyl naphthalene Normal heptane and iso-octane Normal octane and aniline Iso-octane and normal hexane TRUE ANSWER : ? YOUR ANSWER : ?
A gas engine has a swept volume of 300 cm3 and clearance volume of 25 cm3. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is 286 cm3 264 cm3 248 cm3 252 cm3 TRUE ANSWER : ? YOUR ANSWER : ?
The expansion of fuel in a four stroke cycle diesel engine May start and end anywhere Starts at top dead center and ends at 30° after top dead center Starts at 15° before top dead center and ends at 30° after top dead center Starts at 15° after top dead center and ends at 30° before bottom dead center TRUE ANSWER : ? YOUR ANSWER : ?
The delay period in compression ignition engines depends upon Nature of the fuel mixture strength Temperature and pressure in the cylinder at the time of injection Relative velocity between the fuel injection and air turbulence pressure of residual gases All of these TRUE ANSWER : ? YOUR ANSWER : ?