Reactive Maintenance
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Reactive Maintenance

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Questions and Answers

What is one benefit of preventive maintenance mentioned in the text?

  • Raises energy costs
  • Leads to unexpected breakdowns
  • Prevents major repairs, saving on extensive repair or replacement costs (correct)
  • Increases the need for frequent replacements

    • How does preventive maintenance contribute to operational continuity?

  • By lowering energy costs
  • By increasing downtime and causing unexpected breakdowns
  • By avoiding asset management
  • By minimizing downtime and preventing unexpected breakdowns (correct)

    • What does preventive maintenance do for the lifespan of equipment?

  • Increases the lifespan of equipment (correct)
  • Raises energy costs
  • Reduces the lifespan of equipment
  • Improves output quality

    • Why is asset management important in the context of maintenance practices?

    <p>Optimizes inventory and ensures availability of spare parts for timely repairs</p> Signup and view all the answers

    How does preventive maintenance help in enhancing a company's reputation?

    <p>Enhances the company’s reputation for reliability and professionalism</p> Signup and view all the answers

    Which aspect is improved through preventive maintenance to meet customer expectations?

    <p>Output Quality</p> Signup and view all the answers

    What is reactive maintenance?

    <p>A maintenance strategy where no preventive measures are taken</p> Signup and view all the answers

    Which of the following is an example of reactive maintenance?

    <p>Replacing a light bulb after it burns out</p> Signup and view all the answers

    What is a potential advantage of reactive maintenance?

    <p>Perceived cost-effectiveness in the short term</p> Signup and view all the answers

    Which of the following is a disadvantage of reactive maintenance?

    <p>Increased equipment downtime</p> Signup and view all the answers

    What is a potential consequence of reactive maintenance?

    <p>Tight labor budgets due to overtime for urgent repairs</p> Signup and view all the answers

    Which of the following is NOT a characteristic of reactive maintenance?

    <p>Maintenance activities are planned and scheduled</p> Signup and view all the answers

    What is the basic philosophy of Reliability-Centered Maintenance (RCM)?

    <p>Measuring the beginning of system degradation and the present and future functional capability of components</p> Signup and view all the answers

    How does Reliability-Centered Maintenance (RCM) differ from preventive maintenance?

    <p>RCM uses real-time data instead of predetermined schedules</p> Signup and view all the answers

    What are the benefits of Reliability-Centered Maintenance (RCM)?

    <p>Lowers costs by eliminating unnecessary maintenance or overhauls</p> Signup and view all the answers

    How does Reliability-Centered Maintenance (RCM) utilize data from the equipment?

    <p>RCM uses data to map out possible machine breakdowns and identify maintenance needs in a timely manner</p> Signup and view all the answers

    What is the main purpose of the Reliability-Centered Maintenance (RCM) strategy?

    <p>To maximize the use of limited human and financial resources</p> Signup and view all the answers

    How does Reliability-Centered Maintenance (RCM) approach maintenance issues?

    <p>RCM utilizes predictive and preventive maintenance techniques, incorporating root cause failure analysis</p> Signup and view all the answers

    What does SIS stand for?

    <p>Safety Instrumented System</p> Signup and view all the answers

    Which organization developed the IEC 61511 standard for Safety Instrumented Systems?

    <p>International Electrotechnical Commission (IEC)</p> Signup and view all the answers

    What is the purpose of Safety Integrity Level (SIL)?

    <p>To measure the performance of a Safety Instrumented System when a demand is made</p> Signup and view all the answers

    What is the relationship between a Safety Instrumented System (SIS) and Safety Instrumented Functions (SIFs)?

    <p>A SIS is a collection of multiple SIFs, each addressing a specific safety requirement</p> Signup and view all the answers

    Which of the following is NOT an example of a Safety Instrumented System (SIS) mentioned in the text?

    <p>Distributed Control Systems (DCS)</p> Signup and view all the answers

    What is the primary purpose of Safety Instrumented Systems (SIS) as opposed to Basic Process Control Systems (BPCS)?

    <p>To perform flawlessly when a safety demand arises</p> Signup and view all the answers

    What is the primary function of the solenoid valve when de-energized?

    <p>To block air pressure from the I/P and vent air pressure from the actuating diaphragm</p> Signup and view all the answers

    What is the purpose of the Support System?

    <p>To provide necessary utilities for the system to operate</p> Signup and view all the answers

    Which layer utilizes an Instrument Protected Function (IPF)?

    <p>Process Alarms and Interlock System</p> Signup and view all the answers

    What is an example of a Passive Protection Layer?

    <p>Fire Walls</p> Signup and view all the answers

    What is the function of a Rapture Disc?

    <p>To protect a pressure vessel, equipment, or system from over-pressurization</p> Signup and view all the answers

    What is an example of a Final Control Element?

    <p>Control Valve</p> Signup and view all the answers

    Study Notes

    Safety Instrumented Systems (SIS)

    • SIS examples include Critical Control Systems, Safety Shutdown Systems, Instrument Protective Function (IPF), Equipment Protection Systems, and Emergency Shutdown Systems (ESD)

    International Standards for SIS

    • IEC 61508: applicable for manufacturers of devices used in Safety Instrumented Systems (SIS)
    • IEC 61511: "Functional Safety: Safety Instrumented Systems for the Process Industry Sector"
    • ISA 84.01-2004: identical to IEC 61511, "Functional Safety: Safety Instrumented Systems for the Process Industry Sector"

    Classification of SIS

    • SIS are classified according to their applicable Safety Integrity Level (SIL)
    • SIL is a measure of the performance of a Safety System under demand

    Maintenance Strategies

    Preventive Maintenance

    • Benefits: cost savings, operational continuity, extended lifecycle, optimized performance, energy cost savings, safety, and compliance
    • Example: conveyor belt maintenance in a manufacturing setting

    Predictive Maintenance (RCM)

    • Measures the beginning of system degradation and predicts future functional capability
    • Uses real-time data to map out possible machine breakdowns and identify maintenance needs
    • Benefits: efficiency, cost reduction, minimized overhauls, and prevention of sudden failures

    Reactive Maintenance

    • No preventive measures are taken to keep equipment operating as intended by its design
    • Maintenance is only done when equipment shows indications of failure
    • Advantages: cost-effective in the short term, reduction in upfront maintenance expenses
    • Disadvantages: increased downtime costs, higher labor costs, and overtime

    Safety Instrumented Functions (SIF)

    • Can be implemented using several SIF depending on the safety requirement
    • Examples: pressure relief valve, pressure/vacuum valve, and rapture disc

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    Description

    Learn about reactive maintenance, a strategy where equipment is only repaired when it shows signs of failure. Explore examples such as replacing a light bulb and repair work when machinery breaks down.

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