EMC Information Storage Fundamentals — Question 4

A system has three components and all three components need to be operational for 24 hours; Monday through Friday. During a particular week, failure of component 3 occurred as follows:
✑ Tuesday = 8 AM to 1 PM
✑ Thursday = 5 PM to 10 PM
✑ Friday = 5 AM to 10 AM
What is the mean time between failures on component 3 for that week?

Answer options

Correct answer: B

Explanation

The mean time between failures (MTBF) is calculated by considering the total operational time and the time the component was down. In this case, component 3 was operational for a total of 35 hours (out of 72 hours) before experiencing the next failure, making the mean time between failures 35 hours. The other options do not accurately reflect the operational time or include the necessary calculations.