Steps to determine brake (bhp) and motor horsepower (mhp), Civil Engineering

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Steps to determine the brake (bhp) and motor horsepower (mhp): 

1) Determine water horsepower (whp).

hA (Qgpm) (SG) / 3956 OR hA (Qcfs) (SG) / 8.814

2) Apply the pump efficiency given in the problem into the brake horsepower equation along with the whp to determine bhp.

 bhp = (whp/pump efficiency)

pump efficiency = (whp/bhp) 100

3) Apply the motor efficiency given in the problem into the motor horsepower equation along with the bhp to determine mhp. 

 mhp = (bhp/motor efficiency)

motor efficiency = (bhp/mhp) 100


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