FREE Millwright Predictive and Preventive Maintenance Questions and Answers

Question 1

Which statement best describes the primary difference between Preventive Maintenance (PM) and Predictive Maintenance (PdM)?

Accepted Answer

PM is based on a fixed schedule, while PdM is based on the actual condition of the equipment.

Answer

PM is performed after a failure, while PdM is performed before.

Answer

PdM uses only visual inspections, while PM uses advanced technology.

Answer

PM is always less expensive than PdM.

Question 2

Vibration analysis is most effective for detecting which of the following mechanical faults in rotating equipment?

Accepted Answer

Imbalance, misalignment, and bearing defects

Answer

Incorrect lubricant viscosity

Answer

A crack in a stationary machine frame

Answer

Electrical insulation breakdown in a motor

Question 3

An infrared thermography inspection of an electrical cabinet reveals a connection point that is significantly hotter than similar connections under the same load. This most likely indicates:

Accepted Answer

High resistance due to a loose or corroded connection

Answer

A properly torqued connection

Answer

An overloaded circuit

Answer

A short circuit to ground

Question 4

Which of the following is a classic example of a Preventive Maintenance (PM) task?

Accepted Answer

Changing the oil in a gearbox every 2,000 operating hours

Answer

Analyzing a monthly oil sample for wear metals

Answer

Using an ultrasonic detector to find a compressed air leak

Answer

Replacing a bearing because vibration analysis shows a fault

Question 5

What is the primary goal of Root Cause Failure Analysis (RCFA)?

Accepted Answer

To identify and correct the underlying systemic reasons for a failure to prevent recurrence

Answer

To quickly repair the failed component and return the machine to service

Answer

To assign blame for the equipment failure

Answer

To document the cost of the failure for accounting purposes

Question 6

In maintenance terminology, what does the acronym MTBF stand for?

Accepted Answer

Mean Time Between Failures

Answer

Maximum Time Before Failure

Answer

Maintenance Task Before Failure

Answer

Minimum Time Between Fixes