CPM Maintenance and Reliability 3

Question 1

The 'P-F interval' in predictive maintenance refers to:

Accepted Answer

The time between a potential failure signal and functional failure

Answer

The P-F interval is the time between the point where a potential failure becomes detectable (P) and when it becomes a functional failure (F), defining the window for intervention.

Question 2

Which maintenance key performance indicator (KPI) directly measures the percentage of total maintenance time spent on unplanned repairs?

Accepted Answer

Reactive maintenance ratio

Answer

The reactive maintenance ratio tracks the proportion of maintenance hours spent on unplanned, emergency repairs versus total maintenance hours.

Question 3

In a Failure Mode and Effects Analysis (FMEA), the Risk Priority Number (RPN) is calculated as:

Accepted Answer

Severity × Occurrence × Detection

Answer

RPN = Severity × Occurrence × Detection, where each factor is rated on a scale (typically 1–10) to prioritize failure modes for corrective action.

Question 4

A plant uses thermographic infrared scanning during operation to detect hot spots in electrical panels. This is an example of:

Accepted Answer

Condition-based monitoring

Answer

Infrared thermography is a condition monitoring technique that detects thermal anomalies indicating developing faults without requiring equipment shutdown.

Question 5

Which term describes the probability that a system will perform its required function for a specified period under stated conditions?

Accepted Answer

Reliability

Answer

Reliability is specifically defined as the probability of a system performing its intended function without failure over a given time under defined conditions.

(CPM) Certified Plant Manager Practice Test

(CPM) Certified Plant Manager Practice Test

CPM Maintenance and Reliability 3