Question

Which of the following is NOT a type of maintenance of machinery:

• A. Break-down maintenance
• B. Preventive maintenance
• C. Predictive maintenance
• D. Random maintenance

Hint:

Standard maintenance is always about a Plan (Preventive), a Prediction (Predictive), or a Reaction (Break-down). "Random" implies a lack of strategy, which is the opposite of good engineering maintenance.

Answer 1

The Correct Option is D

1. Established Maintenance Types:

• Break-down Maintenance: This is a reactive strategy where repair is performed only after a machine has failed or stopped working.

• Preventive Maintenance: This is a proactive strategy performed at regular, scheduled intervals (regardless of the machine's current state) to reduce the likelihood of failure.

• Predictive Maintenance: This is an advanced strategy that uses condition-monitoring tools (like vibration analysis or infrared thermography) to track the performance of a machine and perform maintenance exactly when it is needed, before a failure occurs.

2. Identifying the Incorrect Term:

Random maintenance is not a recognized technical term in industrial engineering or maintenance management. While equipment failures might occur randomly, maintenance activities themselves are always categorized by the strategy used to address or prevent those failures. Therefore, "Random maintenance" is the correct choice as it does not belong to the standardized classifications of machinery maintenance.