Just after combustion of fuel inside the cylinder, the heat power developed promptly converts into mechanical energy/time over the piston top. This mechanical energy/time or mechanical power (Fresh conversion of heat energy into mechanical energy over the piston top) is called as Indicative power .The indicative power further transfers to the crank shaft by the help of connecting rod. The power available over the crank shaft is called as Brake power. The Magnitude of brake power is always less than indicative power because of losses associated with various types of friction (e.g. the friction between the piston outer surface and inner surface of cylinder, The friction between the piston rings and cylinder inner surface etc) The Brake power of an engine can be found by the help of a device called as dynamo meter. But there is no as such device which can measure the amount of indicative power of engine. For finding the indicative power Morse test has to be performed and that too can be performed over multi cylinder engines. In the following lecture you will learn how Morse test is performed in an engine to find the indicative power of a multi cylinder Engine..