City Guilds Model Questions Vol1 2021 Engineering Question 4
Practice objective / multiple choice question 4 from the 2021 City Guilds Model Questions Vol1 Engineering examination.
A piece of equipment has an exponential time‑to‑failure distribution with a mean time between failures (MTBF) of 2000 h. A corrective failure requires 8 h of downtime and costs \(\$1500\). A preventive maintenance action takes 2 h of downtime, costs \(\$800\), and restores the equipment to "as‑good‑as‑new". Preventive maintenance is performed at regular intervals of \(T\) hours. Determine the smallest preventive interval \(T\) (in hours) that will keep the overall equipment availability at least 95 %. (Availability \(A = 1 - \frac{\text{average downtime per hour}}{1}\).)
Answer Options
About This Question
This is City Guilds Model Questions Vol1 2021 Engineering Question 4. It is one of the objective questions from the 2021 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Hard .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.