The brake power is the power available

A. In the engine cylinder

B. At the crank shaft

C. At the crank pin

D. None of these

Answer: Option B

Solution(By Examveda Team)

The brake power is the power available at the crank shaft.
The brake power (briefly written as B.P.) of an I.C. Engine is the power available at the crankshaft.
The brake power of an I.C. engine is, usually, measured by means of a brake mechanism (prony brake or rope brake).