The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be None of the listed here Higher Lower Remain unaffected TRUE ANSWER : ? YOUR ANSWER : ?
If V₁ is the jet velocity and V₀ is the vehicle velocity, then propulsive efficiency of a turbojet engine is V₁ / (V₀ + V₁) 2V₀ / (V₀ + V₁) V₀ / (V₀ + V₁) 2V₁ / (V₀ + V₁) TRUE ANSWER : ? YOUR ANSWER : ?
In order to eliminate knocking in compression ignition engines, there should be Low compression ratio Late auto-ignition Short delay period High self ignition temperature of fuel TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is false statement? Some of the methods used to reduce diesel smoke are as follows Increasing the compression ratio Adherence to proper fuel specification Using additives in the fuel Avoidance of overloading TRUE ANSWER : ? YOUR ANSWER : ?
Air fuel ratio at which a petrol engine cannot work is 0.62569444444444 0.41736111111111 20 : 1 and less 0.33402777777778 TRUE ANSWER : ? YOUR ANSWER : ?
Compression ratio of I.C. Engines is Ratio of pressure after compression and before compression Swept volume/cylinder volume Volume displaced by piston per stroke and clearance volume in cylinder The ratio of volumes of air in cylinder before compression stroke and after compression stroke TRUE ANSWER : ? YOUR ANSWER : ?
In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will _________ the knocking tendency. Decrease Not effected Increase None of these TRUE ANSWER : ? YOUR ANSWER : ?
The two reference fuels used for cetane rating are Cetane and normal heptane Cetane and iso-octane Cetane and tetra ethyl lead Cetane and alpha-methyl naphthalene TRUE ANSWER : ? YOUR ANSWER : ?
The cetane number of diesel oil, generally available, is 30 to 40 25 to 30 20 to 25 40 to 55 TRUE ANSWER : ? YOUR ANSWER : ?
Most high speed compression engines operate on Otto cycle Dual combustion cycle Special type of air cycle Diesel cycle TRUE ANSWER : ? YOUR ANSWER : ?