When the combustion of charge occurs over the piston top then heat energy converts into work just over the piston top. That is called as indicative power of an engine. The power available over the crank shaft of engine is called as brake power. The brake power of engine can be easily measured by the help of a device called as dynamometer. But there is no as such device to measure the indicative power. To find the indicative power of engine Morse test is performed which is a trick to find the indicative power of multi cylinder engine. Learn the same by the help of video lecture
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