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API 580 - Risk Based Inspection Question and Answers

API 580 - Risk Based Inspection

Last Update Nov 30, 2025
Total Questions : 90

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Questions 1

Which of the following has the most direct relation to the relative accuracy of the RBI analysis?

Options:

A.  

Data precision

B.  

Data quality

C.  

Data sources

D.  

Data validation

Discussion 0
Questions 2

In RBI analysis, dividing process units into groups of equipment that have common characteristics is:

Options:

A.  

not permitted unless equipment is in identical service.

B.  

useful only for common types of equipment.

C.  

to be avoided because every equipment item is unique.

D.  

useful as a means of screening together and saving time.

Discussion 0
Questions 3

Once organizing the work process for RBI program planning has been completed, the next step is the identification of the:

Options:

A.  

appropriate mitigation activities that will be considered.

B.  

credible damage mechanisms and failure modes.

C.  

applicable design and inspection codes and standards.

D.  

data and information required to be collected for RBI analysis.

Discussion 0
Questions 4

Clearly documenting the key assumptions made during an RBI assessment will:

Options:

A.  

quantify the level of acceptable risk.

B.  

identify the level of residual risk.

C.  

allow recreation at a later date.

D.  

demonstrate the precision of the assessment.

Discussion 0
Questions 5

Risk acceptance is normally determined on the basis of criteria defined:

Options:

A.  

in the RBI software.

B.  

in API 580.

C.  

by regulatory authorities.

D.  

by individual companies.

Discussion 0
Questions 6

When equipment has deteriorated to such an extent that the risk of failure cannot be managed and held to an acceptable level, often the only way to mitigate risk is to:

Options:

A.  

repair/replace the equipment.

B.  

perform a fitness-for-service analysis.

C.  

shorten the inspection interval.

D.  

rerate the equipment.

Discussion 0
Questions 7

The continuum of RBI approaches is the:

Options:

A.  

continuous improvement cycle involved in RBI reassessment.

B.  

variance from low to high in detail of RBI analysis.

C.  

range between data collection and risk mitigation for RBI.

D.  

range between qualitative and quantitative RBI.

Discussion 0
Questions 8

One of the steps in estimating the consequences of releasing a hazardous material includes:

Options:

A.  

identifying the most likely failure mode.

B.  

estimating total volume of fluid that may escape.

C.  

determining the deterioration susceptibility and rate.

D.  

identifying active and credible damage mechanisms.

Discussion 0
Questions 9

Which mitigation system most effectively minimizes community exposure to a significant release of an acidic water-soluble vapor cloud?

Options:

A.  

Toxic scrubbers

B.  

Acid detectors

C.  

Blast resistance construction

D.  

Water curtain

Discussion 0
Questions 10

Which of the following would be the minimum expectations of contractors hired to implement an RBI program?

Options:

A.  

Certification in accordance with API RP 580

B.  

Documented training in damage mechanisms

C.  

Certification of corrosion/materials specialist to API RP 571

D.  

Documented training and suitably qualified personnel

Discussion 0
Questions 11

Given the following event tree, what is the risk of a fire if the probability is 0.00001 per year and the consequence is $50,000,000?

Options:

A.  

$500/year

B.  

$5,000/year

C.  

$5,000,000/year

D.  

$50,000,000/year

Discussion 0
Questions 12

"Risk" is defined as the combination of the:

Options:

A.  

probability of consequences from a failure event.

B.  

probability of an event and its consequences.

C.  

failure, loss of containment, and probability of ignition and/or injury.

D.  

probability of failure from identified deterioration mechanisms and subsequent event.

Discussion 0
Questions 13

A risk assessment requires a cost estimate of potential environmental damage. Vessel replacement cost is $116,000, and downtime will be 15 days at a cost of $55,000 per day. The EPA fine for a leak of more than 1500 gallons is $1,650,000, and cleanup will cost $1,145,000. What total value will be assigned to the environmental cost of a leak?

Options:

A.  

$1,145,000

B.  

$1,650,000

C.  

$2,795,000

D.  

$3,620,000

Discussion 0
Questions 14

Conducting more internal inspection than is called for by RBI:

Options:

A.  

reduces risk to the lowest practical level.

B.  

can result in inspection optimization.

C.  

may cause additional deterioration and risk.

D.  

will produce further risk reduction.

Discussion 0
Questions 15

Inspection results can be used for comparison or validation of models that may have been used for:

Options:

A.  

COF determination.

B.  

risk analysis.

C.  

POF determination.

D.  

fitness for service analysis.

Discussion 0
Questions 16

Once a credible damage mechanism(s) has been identified, the associated failure mode should also be identified. An example of a failure mode is:

Options:

A.  

rupture

B.  

stress corrosion cracking

C.  

general corrosion

D.  

embrittlement

Discussion 0
Questions 17

What will affect the level of risk mitigation achieved in RBI?

Options:

A.  

The established frequency of inspection for higher risk equipment

B.  

The quality of the inspection data and the analysis or interpretation of that data

C.  

Replacement of equipment instead of continuing to inspect it after half-life is attained

D.  

Upgrading the metallurgy of equipment to higher alloys which are more corrosion resistant

Discussion 0
Questions 18

In cases where inspection technology cannot adequately and/or cost-effectively mitigate risks, what is the next step to consider?

Options:

A.  

Other risk mitigation approaches

B.  

The equipment should be replaced

C.  

A new risk assessment should be conducted

D.  

The inspection interval should be shortened

Discussion 0
Questions 19

Which of the following statements is accurate regarding data quality relative to the type of RBI assessment selected?

Options:

A.  

Data validation is most important when quantitative RBI is being applied.

B.  

Data quality is equally important no matter what type of assessment is selected.

C.  

Data quality is more important for semi-quantitative assessments vs. qualitative assessments.

D.  

Data accuracy in qualitative RBI is not as important because risks are relative, not absolute.

Discussion 0
Questions 20

In quantitative POF analysis, when failure data for each piece of equipment is unavailable, general industry failure data can be used by what means?

Options:

A.  

Using engineering judgment to estimate the POF categories

B.  

Adjusting the data by qualified persons to make it more equipment specific

C.  

Multiplying it by numerical fractions obtained from applicable industry literature

D.  

Categorizing the probability of failure as high, medium or low with different orders of magnitude

Discussion 0
Questions 21

How important is data quality in RBI assessment?

Options:

A.  

Equally important for all types

B.  

Most important for quantities

C.  

Most important for qualitative RBI

D.  

Not as important in qualitative RBI

Discussion 0
Questions 22

Inspection alone cannot adequately manage risk for equipment:

Options:

A.  

that is nearing end of service life.

B.  

with high probability of failure.

C.  

that has cracking mechanisms.

D.  

frequency dominated risk.

Discussion 0
Questions 23

Which of the following is a step in estimating the consequences of releasing a hazardous material into the surrounding environment?

Options:

A.  

Estimating the release rate

B.  

Identifying the most likely failure mode

C.  

Determining the deterioration susceptibility and rate

D.  

Identifying active and credible damage mechanisms

Discussion 0
Questions 24

What must be developed in order to implement and sustain the RBI program?

Options:

A.  

Jurisdictional approval process

B.  

Inspection plans for all equipment and piping in the RBI program

C.  

Risk mitigation actions to reduce highest risks

D.  

A documented management system

Discussion 0
Questions 25

At the conclusion of the initial planning portion for the development of the RBI program, which of the following important issues should have been completed?

Options:

A.  

Designation of needed team members

B.  

Identification of the physical boundaries

C.  

Collection of the necessary data to be analyzed during the assessment

D.  

Request for resources to complete the analysis (not including implementation)

Discussion 0
Questions 26

Why is it important to identify the risk drivers in the RBI process?

Options:

A.  

To enable development of effective risk mitigation strategies

B.  

To ensure that the most effective inspection plans are implemented

C.  

To avoid having any loss of containment that might have catastrophic results

D.  

To ensure that the right resources are applied for reducing consequences of risk

Discussion 0
Questions 27

The RBI process is capable of generating a comparative ranking based on:

Options:

A.  

relative risk.

B.  

absolute risk.

C.  

general risk.

D.  

specific risk.

Discussion 0
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