Question

An engine produces 90hp, and is 90% efficient. So how much horsepower is being lost because of inefficiency?

a.)90
b.)10
c.)110
d.)9

Answer 1

The efficiency of an engine can be used to determine the amount of horsepower lost due to inefficiency. In this case, the engine produces 90 horsepower and has an efficiency of 90%, resulting in 9 horsepower being lost.

Step-by-step explanation:

To determine how much horsepower is lost due to inefficiency, we need to first find the actual horsepower being produced by the engine.

Given that the engine produces 90 horsepower and the efficiency is 90%, we can calculate the actual horsepower as follows:

Actual Horsepower = (Efficiency/100) * Rated Horsepower

Actual Horsepower = (90/100) * 90 = 81 horsepower

The amount of horsepower lost due to inefficiency is the difference between the rated horsepower and the actual horsepower:

Horsepower lost = Rated Horsepower - Actual Horsepower = 90 - 81 = 9 horsepower.

Therefore, the correct answer is d.) 9.