An automobile emission testing center tests 50 vehicles per hour. Each inspector can inspect one vehicle every four minutes. If the center wants a utilization of 90%, how many inspectors are required?
A) Two
B) Three
C) Four
D) Five

Question

Quizplus · Accepted Answer

To achieve a utilization of 90%, the inspectors must be able to inspect 45 vehicles per hour (since 90% of 50 is 45).

Since each inspector can inspect one vehicle every four minutes, in one hour (which is 60 minutes), one inspector can inspect 15 vehicles (since 60/4=15).

Therefore, to inspect 45 vehicles per hour, we need three inspectors, but we need to account for breaks or shift changes.

So, it is safe to have four inspectors to cover for any unforeseen circumstances or to allow for slightly higher utilization without overworking the inspectors.

Therefore, the answer is C) Four.

An Automobile Emission Testing Center Tests 50 Vehicles Per Hour