ASVAB Mechanical Comprehension Practice Test 750021

Question 3 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 2 hp engine that's 45% efficient?
90 \( \frac{ft⋅lb}{s} \)
1485 \( \frac{ft⋅lb}{s} \)
495 \( \frac{ft⋅lb}{s} \)
22 \( \frac{ft⋅lb}{s} \)