23A
This is how the problem should have been solved to obtain the correct answer:
a. Efficiency = output (watts) x 100.
input (watts)
b. Output = 3(hp) x 746 (watts/hp) = 2238 watts.
c. Input power = E x I = 220 x 15 = 3300 watts.
d. Efficiency = 2238 x 100 = .678 x 100 = 37.8 percent.
3300
e. To solve for equivalent horsepower, simply divide the input power (in watts) by
746 (watts per hp).
Thus:
3300 = 4.42 hp.
746
Now, continue on to frame 25A.
IT0348
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