CMRT Equipment Reliability 5

Question 1

Reliability-Centered Maintenance (RCM) selects maintenance tasks based primarily on which criterion?

Accepted Answer

Consequences of the failure mode

Answer

RCM selects maintenance tasks based on the consequences of failure modes — safety, environmental, operational, and economic — to preserve system function.

Question 2

A Weibull shape parameter (β) of less than 1.0 indicates which type of failure pattern?

Accepted Answer

Infant mortality with decreasing failure rate

Answer

A Weibull β < 1 indicates a decreasing failure rate (infant mortality), β = 1 is constant (random), and β > 1 indicates increasing failure rate (wear-out).

Question 3

Which maintenance strategy should be applied to a failure mode with hidden function, low severity, and no time-based wear-out pattern?

Accepted Answer

Failure-finding task (scheduled inspection)

Answer

Failure-finding tasks are scheduled to detect hidden failures before they combine with another failure to cause a hazardous or operationally significant event.

Question 4

In the context of equipment reliability, 'P-F interval' refers to:

Accepted Answer

The interval between the point of potential failure detection and functional failure

Answer

The P-F interval is the time from when a potential failure (P) can first be detected to when it degrades into a functional failure (F), defining the window for condition monitoring.

Question 5

Which reliability improvement technique involves redesigning a system so that a single component failure cannot cause total system loss of function?

Accepted Answer

Redundancy

Answer

Redundancy adds backup components or subsystems so that the system continues operating even when one element fails.

(CMRT) Certified Maintenance and Reliability Technician Practice Test

(CMRT) Certified Maintenance and Reliability Technician Practice Test

CMRT Equipment Reliability 5