ASVAB Mechanical Comprehension Practice Test 180445

Question 2 of 5
Efficiency

The efficiency of a machine describes how much of the power put into the machine is turned into movement or force. A 100% efficient machine would turn all of the input power into output movement or force. However, no machine is 100% efficient due to friction, heat, wear and other imperfections that consume input power without delivering any output.

What is the power output of a 9 hp engine that's 30% efficient?
742.5 \( \frac{ft⋅lb}{s} \)
2970 \( \frac{ft⋅lb}{s} \)
1485 \( \frac{ft⋅lb}{s} \)
371.3 \( \frac{ft⋅lb}{s} \)