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Examoogle • User • info@examoogle.com • EE-2024-8821
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Overhauling is the part of____________
Preventive maintenance
Predictive maintenance
Breakdown maintenance
Routine maintenance
Preventive maintenance
Quick Summary: Overhauling is a comprehensive form of preventive maintenance involving the systematic disassembly, inspection, repair, and replacement of parts in a machine or system. It is performed at scheduled intervals to restore equipment to a 'like-new' condition, thereby extending its service life and ensuring reliability.
Overhauling is a comprehensive form of preventive maintenance involving the systematic disassembly, inspection, repair, and replacement of parts in a machine or system. It is performed at scheduled intervals to restore equipment to a 'like-new' condition, thereby extending its service life and ensuring reliability.
MTBFnew=MTBFold+Δt — represents the extension of Mean Time Between Failures post-overhaul
The principle relies on the Time-Based Maintenance (TBM) approach, where maintenance interventions are triggered by operational hours or calendar dates rather than current condition. By replacing worn or fatigue-prone components before they reach a failure state, the probability of unexpected breakdown is significantly reduced. The process typically follows a cycle: shutdown, isolation, inspection, component replacement, reassembly, and testing.
Overhauling is a proactive strategy to mitigate cumulative wear and tear.
It requires planned downtime, which is a major logistical consideration.
It is common in rotating machinery like turbines, compressors, and diesel engines.
Differs from routine maintenance which involves minor tasks like lubrication or cleaning.
High reliability and reduced risk of catastrophic failure.
Optimizes machine efficiency and performance parameters.
Extends the operational lifecycle of capital assets.
High cost of labor and spare parts.
Potential for unnecessary maintenance if components replaced are still functional.
Requires significant planned shutdown time.
Large-scale thermal power plant turbines.
Internal combustion engines after a fixed mileage.
High-voltage electrical switchgear maintenance.
Predictive maintenance (Option B) uses condition monitoring (e.g., vibration analysis) rather than fixed schedules.
Breakdown maintenance (Option C) is a reactive, 'fix-it-when-it-breaks' approach.
Routine maintenance (Option D) refers to daily or weekly small tasks like inspection and minor adjustment.
A is correct — Overhauling is a scheduled, intensive preventive maintenance activity aimed at restoring equipment to its design performance standards.
In competitive exams, remember: If the maintenance is 'scheduled based on time', it's Preventive; if it is 'based on health data', it's Predictive.