Maintenance & Reliability interview questions

1. A.PSM element ensuring vessels, piping, relief devices, instruments and rotating equipment are inspected, tested and maintained under written procedures
2. B.reliability-centred maintenance, an FMEA-based choice of the most cost-effective task (on-condition, scheduled restoration, run-to-failure) for each failure mode
3. C.ABC ranking of equipment by safety, environmental and production consequence of failure, which decides spares, PM frequency and condition monitoring
4. D.mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)

Answer + AI explanation with Pro

1. A.MTBF and MTTR
2. B.Preventive vs predictive maintenance
3. C.Mechanical integrity
4. D.Criticality ranking

Answer + AI explanation with Pro

1. A.Mechanical integrity — in-service inspection codes for pressure vessels, process piping and storage tanks respectively, fixing internal, external and thickness-survey intervals
2. B.Mechanical integrity — risk-based inspection methodology setting inspection scope and interval from probability of failure by damage mechanism times consequence of failure
3. C.Mechanical integrity — PSM element ensuring vessels, piping, relief devices, instruments and rotating equipment are inspected, tested and maintained under written procedures
4. D.Mechanical integrity — mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)

Answer + AI explanation with Pro

1. A.fixed CML points measured by ultrasonic testing to compute corrosion rate and remaining life; next interval is half the remaining life or the code maximum
2. B.preventive is time-based servicing; predictive uses condition monitoring such as vibration, thermography and oil analysis to act only when degradation appears
3. C.mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)
4. D.risk-based inspection methodology setting inspection scope and interval from probability of failure by damage mechanism times consequence of failure

Answer + AI explanation with Pro

1. A.RCM
2. B.Mechanical integrity
3. C.Preventive vs predictive maintenance
4. D.API 580/581 RBI

Answer + AI explanation with Pro

1. A.Preventive vs predictive maintenance — preventive is time-based servicing; predictive uses condition monitoring such as vibration, thermography and oil analysis to act only when degradation appears
2. B.Preventive vs predictive maintenance — PSM element ensuring vessels, piping, relief devices, instruments and rotating equipment are inspected, tested and maintained under written procedures
3. C.Preventive vs predictive maintenance — fixed CML points measured by ultrasonic testing to compute corrosion rate and remaining life; next interval is half the remaining life or the code maximum
4. D.Preventive vs predictive maintenance — ABC ranking of equipment by safety, environmental and production consequence of failure, which decides spares, PM frequency and condition monitoring

Answer + AI explanation with Pro

1. A.PSM element ensuring vessels, piping, relief devices, instruments and rotating equipment are inspected, tested and maintained under written procedures
2. B.risk-based inspection methodology setting inspection scope and interval from probability of failure by damage mechanism times consequence of failure
3. C.fixed CML points measured by ultrasonic testing to compute corrosion rate and remaining life; next interval is half the remaining life or the code maximum
4. D.computerised maintenance management system such as SAP PM or Maximo holding equipment registers, work orders, PM schedules and history

Answer + AI explanation with Pro

1. A.API 580/581 RBI
2. B.CMMS
3. C.API 510 / 570 / 653
4. D.Preventive vs predictive maintenance

Answer + AI explanation with Pro

1. A.CMMS — fixed CML points measured by ultrasonic testing to compute corrosion rate and remaining life; next interval is half the remaining life or the code maximum
2. B.CMMS — preventive is time-based servicing; predictive uses condition monitoring such as vibration, thermography and oil analysis to act only when degradation appears
3. C.CMMS — mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)
4. D.CMMS — computerised maintenance management system such as SAP PM or Maximo holding equipment registers, work orders, PM schedules and history

Answer + AI explanation with Pro

1. A.PSM element ensuring vessels, piping, relief devices, instruments and rotating equipment are inspected, tested and maintained under written procedures
2. B.preventive is time-based servicing; predictive uses condition monitoring such as vibration, thermography and oil analysis to act only when degradation appears
3. C.computerised maintenance management system such as SAP PM or Maximo holding equipment registers, work orders, PM schedules and history
4. D.risk-based inspection methodology setting inspection scope and interval from probability of failure by damage mechanism times consequence of failure

Answer + AI explanation with Pro

1. A.API 580/581 RBI
2. B.Turnaround
3. C.RCM
4. D.CMMS

Answer + AI explanation with Pro

1. A.API 580/581 RBI — risk-based inspection methodology setting inspection scope and interval from probability of failure by damage mechanism times consequence of failure
2. B.API 580/581 RBI — fixed CML points measured by ultrasonic testing to compute corrosion rate and remaining life; next interval is half the remaining life or the code maximum
3. C.API 580/581 RBI — ABC ranking of equipment by safety, environmental and production consequence of failure, which decides spares, PM frequency and condition monitoring
4. D.API 580/581 RBI — planned plant-wide shutdown every 3–5 years for statutory inspection, catalyst change and major repairs, run as a project with a frozen scope list

Answer + AI explanation with Pro

1. A.in-service inspection codes for pressure vessels, process piping and storage tanks respectively, fixing internal, external and thickness-survey intervals
2. B.preventive is time-based servicing; predictive uses condition monitoring such as vibration, thermography and oil analysis to act only when degradation appears
3. C.mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)
4. D.computerised maintenance management system such as SAP PM or Maximo holding equipment registers, work orders, PM schedules and history

Answer + AI explanation with Pro

1. A.Mechanical integrity
2. B.API 510 / 570 / 653
3. C.MTBF and MTTR
4. D.API 580/581 RBI

Answer + AI explanation with Pro

1. A.API 510 / 570 / 653 — fixed CML points measured by ultrasonic testing to compute corrosion rate and remaining life; next interval is half the remaining life or the code maximum
2. B.API 510 / 570 / 653 — in-service inspection codes for pressure vessels, process piping and storage tanks respectively, fixing internal, external and thickness-survey intervals
3. C.API 510 / 570 / 653 — mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)
4. D.API 510 / 570 / 653 — computerised maintenance management system such as SAP PM or Maximo holding equipment registers, work orders, PM schedules and history

Answer + AI explanation with Pro

1. A.mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)
2. B.planned plant-wide shutdown every 3–5 years for statutory inspection, catalyst change and major repairs, run as a project with a frozen scope list
3. C.risk-based inspection methodology setting inspection scope and interval from probability of failure by damage mechanism times consequence of failure
4. D.fixed CML points measured by ultrasonic testing to compute corrosion rate and remaining life; next interval is half the remaining life or the code maximum

Answer + AI explanation with Pro

1. A.CMMS
2. B.Thickness monitoring locations
3. C.RCM
4. D.Mechanical integrity

Answer + AI explanation with Pro

1. A.Thickness monitoring locations — planned plant-wide shutdown every 3–5 years for statutory inspection, catalyst change and major repairs, run as a project with a frozen scope list
2. B.Thickness monitoring locations — fixed CML points measured by ultrasonic testing to compute corrosion rate and remaining life; next interval is half the remaining life or the code maximum
3. C.Thickness monitoring locations — in-service inspection codes for pressure vessels, process piping and storage tanks respectively, fixing internal, external and thickness-survey intervals
4. D.Thickness monitoring locations — computerised maintenance management system such as SAP PM or Maximo holding equipment registers, work orders, PM schedules and history

Answer + AI explanation with Pro

1. A.planned plant-wide shutdown every 3–5 years for statutory inspection, catalyst change and major repairs, run as a project with a frozen scope list
2. B.preventive is time-based servicing; predictive uses condition monitoring such as vibration, thermography and oil analysis to act only when degradation appears
3. C.mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)
4. D.risk-based inspection methodology setting inspection scope and interval from probability of failure by damage mechanism times consequence of failure

Answer + AI explanation with Pro

1. A.Turnaround
2. B.Preventive vs predictive maintenance
3. C.API 580/581 RBI
4. D.RCM

Answer + AI explanation with Pro

1. A.Turnaround — ABC ranking of equipment by safety, environmental and production consequence of failure, which decides spares, PM frequency and condition monitoring
2. B.Turnaround — computerised maintenance management system such as SAP PM or Maximo holding equipment registers, work orders, PM schedules and history
3. C.Turnaround — planned plant-wide shutdown every 3–5 years for statutory inspection, catalyst change and major repairs, run as a project with a frozen scope list
4. D.Turnaround — in-service inspection codes for pressure vessels, process piping and storage tanks respectively, fixing internal, external and thickness-survey intervals

Answer + AI explanation with Pro

1. A.planned plant-wide shutdown every 3–5 years for statutory inspection, catalyst change and major repairs, run as a project with a frozen scope list
2. B.ABC ranking of equipment by safety, environmental and production consequence of failure, which decides spares, PM frequency and condition monitoring
3. C.mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)
4. D.risk-based inspection methodology setting inspection scope and interval from probability of failure by damage mechanism times consequence of failure

Answer + AI explanation with Pro

1. A.MTBF and MTTR
2. B.Thickness monitoring locations
3. C.Turnaround
4. D.CMMS

Answer + AI explanation with Pro

1. A.MTBF and MTTR — reliability-centred maintenance, an FMEA-based choice of the most cost-effective task (on-condition, scheduled restoration, run-to-failure) for each failure mode
2. B.MTBF and MTTR — planned plant-wide shutdown every 3–5 years for statutory inspection, catalyst change and major repairs, run as a project with a frozen scope list
3. C.MTBF and MTTR — mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)
4. D.MTBF and MTTR — fixed CML points measured by ultrasonic testing to compute corrosion rate and remaining life; next interval is half the remaining life or the code maximum

Answer + AI explanation with Pro

1. A.computerised maintenance management system such as SAP PM or Maximo holding equipment registers, work orders, PM schedules and history
2. B.preventive is time-based servicing; predictive uses condition monitoring such as vibration, thermography and oil analysis to act only when degradation appears
3. C.planned plant-wide shutdown every 3–5 years for statutory inspection, catalyst change and major repairs, run as a project with a frozen scope list
4. D.reliability-centred maintenance, an FMEA-based choice of the most cost-effective task (on-condition, scheduled restoration, run-to-failure) for each failure mode

Answer + AI explanation with Pro

1. A.MTBF and MTTR
2. B.Mechanical integrity
3. C.RCM
4. D.API 580/581 RBI

Answer + AI explanation with Pro

1. A.RCM — preventive is time-based servicing; predictive uses condition monitoring such as vibration, thermography and oil analysis to act only when degradation appears
2. B.RCM — ABC ranking of equipment by safety, environmental and production consequence of failure, which decides spares, PM frequency and condition monitoring
3. C.RCM — mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)
4. D.RCM — reliability-centred maintenance, an FMEA-based choice of the most cost-effective task (on-condition, scheduled restoration, run-to-failure) for each failure mode

Answer + AI explanation with Pro

1. A.fixed CML points measured by ultrasonic testing to compute corrosion rate and remaining life; next interval is half the remaining life or the code maximum
2. B.mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)
3. C.ABC ranking of equipment by safety, environmental and production consequence of failure, which decides spares, PM frequency and condition monitoring
4. D.risk-based inspection methodology setting inspection scope and interval from probability of failure by damage mechanism times consequence of failure

Answer + AI explanation with Pro

1. A.RCM
2. B.Criticality ranking
3. C.Thickness monitoring locations
4. D.CMMS

Answer + AI explanation with Pro

1. A.Criticality ranking — planned plant-wide shutdown every 3–5 years for statutory inspection, catalyst change and major repairs, run as a project with a frozen scope list
2. B.Criticality ranking — mean time between failures measures reliability and mean time to repair measures maintainability; availability equals MTBF/(MTBF + MTTR)
3. C.Criticality ranking — ABC ranking of equipment by safety, environmental and production consequence of failure, which decides spares, PM frequency and condition monitoring
4. D.Criticality ranking — fixed CML points measured by ultrasonic testing to compute corrosion rate and remaining life; next interval is half the remaining life or the code maximum

Answer + AI explanation with Pro