engineering recuitment ISRO Scientist Mechanical Mock Test Internal Combustion Engine Engine Performance Parameter Power and Efficiency
The following are the results of a Morse test conducted on a four-cylinder, four-stroke petrol engine at a common constant speed in all cases:
The brake power of the engine when all the cylinders are firing is 80 kW. The brake power of the engine when each cylinder is cut off in turn is 55 kW, 55.5 kW. 54.5 kW and 55 kW, respectively.
The mechanical efficiency of the engine when all the cylinders are firing will be1
90%
2
85%
3
80%
4
75%