Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to Cylinder walls being too hot Red hot carbon deposits on cylinder walls Any one of the listed here Overheated spark plug points TRUE ANSWER : ? YOUR ANSWER : ?
In the crankcase method of scavenging, the air pressure is produced by Centrifugal pump Natural aspirator Movement of engine piston Supercharger TRUE ANSWER : ? YOUR ANSWER : ?
The frictional power (F.P.) is given by P. P. F.P. = I.P./ F.P. = P. - I.P. F.P. = F.P. = I.P. - P./I.P. TRUE ANSWER : ? YOUR ANSWER : ?
Scavenging is usually done to increase Fuel consumption Power output Thermal efficiency Speed TRUE ANSWER : ? YOUR ANSWER : ?
The brake power is the power available At the crank shaft None of these At the crank pin In the engine cylinder TRUE ANSWER : ? YOUR ANSWER : ?
A supercharged engine as compared to an ordinary engine Requires smaller foundation Is lighter All of these Consumes less lubricating oil TRUE ANSWER : ? YOUR ANSWER : ?
Diesel engine can work on very lean air fuel ratio of the order of 30: 1. A petrol engine can also work on such a lean ratio provided Best quality fuel is used It is properly designed Cannot work as it is impossible Flywheel size is proper TRUE ANSWER : ? YOUR ANSWER : ?
The knocking in diesel engines may be prevented by Reducing the delay period All of these Raising the compression ratio Increasing the inlet pressure of air TRUE ANSWER : ? YOUR ANSWER : ?
In an internal combustion engine, the process of removing the burnt gases from the combustion chamber of the engine cylinder is known as Detonation Scavenging Polymerisation Supercharging TRUE ANSWER : ? YOUR ANSWER : ?
A mixture containing 65% of iso-octane and 35% of normal heptane will have Cetane number 35 Octane number 35 Cetane number 65 Octane number 65 TRUE ANSWER : ? YOUR ANSWER : ?