You are working as a quality control engineer. You test four machines to determine their efficiency. The LEAST efficient machine needs to be sent in to a special shop to be repaired. Which of the following machines is most likely in need of a trip to the repair shop?

Question

You are working as a quality control engineer. You test four machines to determine their efficiency. The LEAST efficient machine needs to be sent in to a special shop to be repaired. Which of the following machines is most likely in need of a trip to the repair shop?

A 500j/1000j
B 900j/3800j
C 220j/400j
D 3600j/5000j

Answer 1

C 220j/400j

In this case, the efficiency is calculated by dividing the work output by the energy input. Therefore, the machine with the lowest efficiency (in this case, machine C) would be the one most likely in need of repair.