27 real Maintenance Management questions from the Production & Plant bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What is MTBF?
Junior
A.total repair downtime divided by the number of repairs, the measure of how maintainable a machine is
B.time between the point a failure becomes detectable and the functional failure, with the inspection interval set at no more than half of it
C.total operating time divided by the number of failures, the reliability measure of a repairable machine
D.FFT of a bearing-housing signal where 1× running speed points to unbalance, 2× to misalignment and BPFO/BPFI frequencies to bearing defects, graded against ISO 20816 zones
A.MTBF — FFT of a bearing-housing signal where 1× running speed points to unbalance, 2× to misalignment and BPFO/BPFI frequencies to bearing defects, graded against ISO 20816 zones
B.MTBF — operators taking over cleaning, inspection, lubrication and tightening of their own machines through a seven-step programme
C.MTBF — total operating time divided by the number of failures, the reliability measure of a repairable machine
D.MTBF — autonomous maintenance, planned maintenance, focused improvement, quality maintenance, early equipment management, training, office TPM and safety-health-environment
A.total repair downtime divided by the number of repairs, the measure of how maintainable a machine is
B.notification raised, work order created and planned, materials reserved, work confirmed and the order technically completed with history
C.choosing each maintenance task from the consequences of a failure mode using the seven questions of SAE JA1011, rather than a fixed calendar
D.FFT of a bearing-housing signal where 1× running speed points to unbalance, 2× to misalignment and BPFO/BPFI frequencies to bearing defects, graded against ISO 20816 zones
A.total repair downtime divided by the number of repairs, the measure of how maintainable a machine is
B.total operating time divided by the number of failures, the reliability measure of a repairable machine
C.autonomous maintenance, planned maintenance, focused improvement, quality maintenance, early equipment management, training, office TPM and safety-health-environment
D.FFT of a bearing-housing signal where 1× running speed points to unbalance, 2× to misalignment and BPFO/BPFI frequencies to bearing defects, graded against ISO 20816 zones
8. Which term means: "autonomous maintenance, planned maintenance, focused improvement, quality maintenance, early equipment management, training, office TPM and safety-health-environment"?
A.TPM eight pillars — FFT of a bearing-housing signal where 1× running speed points to unbalance, 2× to misalignment and BPFO/BPFI frequencies to bearing defects, graded against ISO 20816 zones
B.TPM eight pillars — notification raised, work order created and planned, materials reserved, work confirmed and the order technically completed with history
C.TPM eight pillars — autonomous maintenance, planned maintenance, focused improvement, quality maintenance, early equipment management, training, office TPM and safety-health-environment
D.TPM eight pillars — operators taking over cleaning, inspection, lubrication and tightening of their own machines through a seven-step programme
A.FFT of a bearing-housing signal where 1× running speed points to unbalance, 2× to misalignment and BPFO/BPFI frequencies to bearing defects, graded against ISO 20816 zones
B.total operating time divided by the number of failures, the reliability measure of a repairable machine
C.autonomous maintenance, planned maintenance, focused improvement, quality maintenance, early equipment management, training, office TPM and safety-health-environment
D.operators taking over cleaning, inspection, lubrication and tightening of their own machines through a seven-step programme
A.Autonomous maintenance — operators taking over cleaning, inspection, lubrication and tightening of their own machines through a seven-step programme
B.Autonomous maintenance — total operating time divided by the number of failures, the reliability measure of a repairable machine
C.Autonomous maintenance — autonomous maintenance, planned maintenance, focused improvement, quality maintenance, early equipment management, training, office TPM and safety-health-environment
D.Autonomous maintenance — time between the point a failure becomes detectable and the functional failure, with the inspection interval set at no more than half of it
14. Which term means: "choosing each maintenance task from the consequences of a failure mode using the seven questions of SAE JA1011, rather than a fixed calendar"?
A.Reliability-centred maintenance — notification raised, work order created and planned, materials reserved, work confirmed and the order technically completed with history
B.Reliability-centred maintenance — total operating time divided by the number of failures, the reliability measure of a repairable machine
C.Reliability-centred maintenance — FFT of a bearing-housing signal where 1× running speed points to unbalance, 2× to misalignment and BPFO/BPFI frequencies to bearing defects, graded against ISO 20816 zones
D.Reliability-centred maintenance — choosing each maintenance task from the consequences of a failure mode using the seven questions of SAE JA1011, rather than a fixed calendar
A.autonomous maintenance, planned maintenance, focused improvement, quality maintenance, early equipment management, training, office TPM and safety-health-environment
B.FFT of a bearing-housing signal where 1× running speed points to unbalance, 2× to misalignment and BPFO/BPFI frequencies to bearing defects, graded against ISO 20816 zones
C.total operating time divided by the number of failures, the reliability measure of a repairable machine
D.operators taking over cleaning, inspection, lubrication and tightening of their own machines through a seven-step programme
17. Which term means: "FFT of a bearing-housing signal where 1× running speed points to unbalance, 2× to misalignment and BPFO/BPFI frequencies to bearing defects, graded against ISO 20816 zones"?
A.Vibration spectrum analysis — FFT of a bearing-housing signal where 1× running speed points to unbalance, 2× to misalignment and BPFO/BPFI frequencies to bearing defects, graded against ISO 20816 zones
B.Vibration spectrum analysis — total operating time divided by the number of failures, the reliability measure of a repairable machine
C.Vibration spectrum analysis — choosing each maintenance task from the consequences of a failure mode using the seven questions of SAE JA1011, rather than a fixed calendar
D.Vibration spectrum analysis — time between the point a failure becomes detectable and the functional failure, with the inspection interval set at no more than half of it
A.FFT of a bearing-housing signal where 1× running speed points to unbalance, 2× to misalignment and BPFO/BPFI frequencies to bearing defects, graded against ISO 20816 zones
B.notification raised, work order created and planned, materials reserved, work confirmed and the order technically completed with history
C.autonomous maintenance, planned maintenance, focused improvement, quality maintenance, early equipment management, training, office TPM and safety-health-environment
D.time between the point a failure becomes detectable and the functional failure, with the inspection interval set at no more than half of it
20. Which term means: "notification raised, work order created and planned, materials reserved, work confirmed and the order technically completed with history"?
A.SAP PM work order flow — total repair downtime divided by the number of repairs, the measure of how maintainable a machine is
B.SAP PM work order flow — operators taking over cleaning, inspection, lubrication and tightening of their own machines through a seven-step programme
C.SAP PM work order flow — notification raised, work order created and planned, materials reserved, work confirmed and the order technically completed with history
D.SAP PM work order flow — choosing each maintenance task from the consequences of a failure mode using the seven questions of SAE JA1011, rather than a fixed calendar
23. Which term means: "time between the point a failure becomes detectable and the functional failure, with the inspection interval set at no more than half of it"?
A.P-F interval — time between the point a failure becomes detectable and the functional failure, with the inspection interval set at no more than half of it
B.P-F interval — non-contact imaging that reveals hot spots in electrical joints, motor bearings and refractory before they fail, done on a route
C.P-F interval — total operating time divided by the number of failures, the reliability measure of a repairable machine
D.P-F interval — choosing each maintenance task from the consequences of a failure mode using the seven questions of SAE JA1011, rather than a fixed calendar
A.notification raised, work order created and planned, materials reserved, work confirmed and the order technically completed with history
B.FFT of a bearing-housing signal where 1× running speed points to unbalance, 2× to misalignment and BPFO/BPFI frequencies to bearing defects, graded against ISO 20816 zones
C.time between the point a failure becomes detectable and the functional failure, with the inspection interval set at no more than half of it
D.non-contact imaging that reveals hot spots in electrical joints, motor bearings and refractory before they fail, done on a route
26. Which term means: "non-contact imaging that reveals hot spots in electrical joints, motor bearings and refractory before they fail, done on a route"?
A.Infrared thermography — non-contact imaging that reveals hot spots in electrical joints, motor bearings and refractory before they fail, done on a route
B.Infrared thermography — operators taking over cleaning, inspection, lubrication and tightening of their own machines through a seven-step programme
C.Infrared thermography — choosing each maintenance task from the consequences of a failure mode using the seven questions of SAE JA1011, rather than a fixed calendar
D.Infrared thermography — notification raised, work order created and planned, materials reserved, work confirmed and the order technically completed with history
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