Question 41Motor Plants - Assistant Engineer

You are correct, the answer is B) brake horsepower. Brake horsepower (BHP) is the most important factor in engine performance because it represents the actual power output at the end of the crankshaft that is available for doing work. It takes into account the power losses due to friction, pumping, and other internal engine components, unlike indicated horsepower which does not account for these losses. The other options are incorrect because: A) indicated horsepower does not account for power losses, C) net horsepower is a term used to describe the power output after accessories are factored in, and D) friction horsepower represents only the power lost to friction, not the actual usable power output.