Preventive maintenance time includes:

Question

Options

• ARepair of equipment which has failed.
• BDowntime for routine or scheduled tasks to retain an item in operable condition.
• CObtaining spares, making adjustments, and confirming repaired condition by test.
• DDelay time such as meals and awaiting spares from off-site or remote location.

• A
  5% (2)
• B
  83% (33)
• C
  3% (1)
• D
  10% (4)

Explanation

Preventive maintenance (PM) time specifically refers to scheduled, proactive activities performed to keep equipment in operable condition before failure occurs - making B the correct answer, as it captures both the "routine/scheduled" nature and the "retain in operable condition" purpose that define PM.

Why the distractors are wrong:

• A describes corrective maintenance (fixing something already broken), which is the opposite of preventive.
• C describes activities that belong to corrective maintenance active time - obtaining spares, adjusting, and verifying a repair all follow a failure event.
• D describes logistic delay time (or administrative downtime), a separate category that applies to both corrective and preventive maintenance but is never classified as PM time itself.

Memory tip: Think of "preventive" like a car oil change - you do it on a schedule, before anything breaks, to keep the car running. If you're fixing something or waiting for parts after a breakdown, that's no longer prevention.

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