1) A physical condition or a release release of a haz- ardous material that could could result from component component failure and result in human injury or death, loss or damage, or environ- mental degradation. degradation. A. Hazard B. Loss C. Failure 2) Limitation of any negative conseconse- quence quence or reduction reduction in probability of a particular particular event. event. A. B. C.
Mitigation Reduction Residual
3) Methods Methods that use engine engineerin ering g judgment judgment and experien experience ce as the bases bases for the analysis analysis of probabilities probabilities and consequences consequences of failure. A. Qualitative risk as assessment B. Relative risk C. Nominal risk 4) An analysis that identifies identifies and delineates delineates the combinations combinations of events, estimates the frequency frequency of occurrence for each combination and estimates the consequences. consequences . A. Qunatitative risk analysis B. Qualitative risk analysis C. Process ha hazard an analysis 5) ………………us ………………uses es logic logic models models depict depicting ing combin combinatio ations ns of events events A. Qunati Qunatitat tative ive risk risk anal analysi ysiss B. Qualit Qualitati ative ve risk risk analys analysis is C. Proc Proces esss hazar hazard d analy analysi siss
6) Quantitat Quantitative ive risk analys analysis is logic models models genera generally lly consist consist of …………..and …………..and ………… ………… A. B. C.
Event trees and fault trees Product trees and loss trees Likl Liklil ilho hood od tree rees and and cons conseeque quence nce trees ees
7) …………….delineate …………….delineate initiating initiating events and combinations combinations of system system successes successes and failures failures A. B. C.
Event trees Fault trees Logic trees
8) ……….. Depict ways in which the system failures failures rep- resented in in the event event trees can occur. occur. A. Event vent tre trees B. Faul ault tree rees C. Logic gic tre trees 9) The comparative comparative risk risk of a facility, process unit, unit, system, equipment equipment item item or component component to to other facilities A. B. C.
Relative risk Absolute risk No risk
10) Combination of the probability of an event and its consequence. A. B. C. D.
Risk Failure Loss Reduction
11) Systematic use of information to identify sources and to estimate the risk. A. Risk B. Risk analysis C. Hazard analysis 12) …………….. Pro- vides a basis for risk evaluation, risk mitigation and risk acceptance. A. Risk B. Risk analysis C. Hazard analysis 13) Process used to assign values to the probability and consequence of a risk. A. Risk evaluation B. Risk estimation C. Risk identification 14) Process used to compare the esti- mated risk against given risk criteria to determine the significance of the risk. A. Risk evaluation B. Risk estimation C. Risk identification 15) Process to find, list, and char- acterize elements of risk. A. Risk estimation B. Risk evaluation C. Risk identification 16) Coordinated activities to direct and control an organization with regard to risk. A. B. C.
Risk management Risk evaluation Risk control
17) Thing or activity with a potential for con- sequence. A. Source B. Hazard C. Toxic 18) ……………..in a safety context is a hazard. A. Source B. Toxic
19) The risk prior to mitigation activities A. B. C.
Unmitigated risk Known risk Mitigated risk
20) ………… is the combination of the probability of some event occurring during a time period of interest and the conse- quences, associated with the event. A. Risk B. Loss C. Mitigated risk 21) Act of mitigating a known risk to a lower level of risk A. B. C.
Risk reduction Risk mitigation Risk evaluation
22) A pro- cess to assess risks, to determine if risk reduction is required and to develop a plan to maintain risks at an acceptable level. A. B. C.
Risk management Risk mitigation Risk control
23) When somem risk identified as acceptable then one of the following is not required A. B. C. D.
Risk reduction Risk evaluation Risk mitigation Risk control
24) In process plants, ………………… are established to detect and evaluate deterioration due to inser- vice operation A. B. C. D.
Inspection and testing programs Condition monitoring programs Preventive maintenance programs Inservice inspection programs
25) When an equipment has low deterioration rates as an inspector what you decide in lieu of internal inspection A. B. C.
On-stream inspection Out of service inspection External inspection
26) ………… represents the next generation of inspection approaches and interval setting, recognizing that the ultimate goal of inspection is the safety and reliability of operating facilities. A.
Rbi
B. C. D.
Pha Hazop Rcm
27) For a typical inspection program, if excessive inspection is applied then, A. B. C.
Level of risk may go up Level of risk may go down Level of risk remain the same
28) ……… provides a consistent methodology for assessing the optimum combination of methods and frequencies. A. Rbi B. Rcm C. Pha D. Hazop 29) Through ……………, inspection activities are focused on higher risk items and away from lower risk items. A. B. C. D.
Rbi Pha Rcm Hazop
30) Following are not the residual risk factors for loss of containment A. B. C. D.
Human error Natural disasters Fundamental limitations of inspection method Toxic fluid containment
31) Rbi is focused on a sys- tematic determination of A. Relative risks B. Absolute risks C. Comparable risks D. Total risks 32) Act of mitigating a known risk to a lower level of risk. A. Risk reduction B. Risk management C. Risk mitigation 33) Some failures have potentially serious conse- quences, but if the probability of the incident is low, then A. B. C.
The risk may not warrant immediate action The risk may warrant immediate action The risk may warrant appropriate mitigation action
34) If the prob- ability and consequence combination (risk) is high enough to be unacceptable, then A. A mitigation action to predict or prevent the event is recommended. B. A mitigation action to predict or prevent the event is not recommended C. Warrant to analyse risks involved
35) ……………..refers to a prescrip- tive methodology that has resulted from the application of risk analysis techniques at many different types of facilities, A. B. C.
Quantitative risk assessment (qra) Qualitative risk assessment Semiquantitative risk assessment
36) A rbi analysis shares many of the techniques and data requirements with a ……. A. B. C. D.
Qra Pha Hazop Event tree
37) If a qra has been prepared for a process unit, the …………analysis can borrow extensively from this effort. A. B. C.
Rbi consequence Rbi liklihood Rbi probability
38) Hazard identification in a rbi analysis generally focuses on identifiable failure mech- anisms in the equipment (inspectable causes) but does not explicitly deal with A. B. C.
Other potential failure scenarios resulting from events such as power failures or human errors. Other potential failure resulting from events such as flammable fire due to leak from equipment Environmental impact caused due to toxic release
39) ……………..deals with total risk than with risk involve only with the equipment A. B. C. D.
Qra Rbi Pha Fta
40) Risk presented in qunatitative risk analysis as a A. B. C.
Precise numeric value Form of risk matrix Form of event tree and fault tree
41) Risk presented in qualitative risk analysis as D. E. F.
Precise numeric value Form of risk matrix Form of event tree and fault tree
42) Results from qunatitative analysis logic models are validated by A. Expert judgment. B. Inspection engineer
C. Maintenance engineer D. Operations personnel 43) The suitability and current condition of the equipment within the current operating envelope will determine the ………….of the equipment from one or more deterioration mechanisms. A. B. C. D.
Probability of failure (pof) Consequence of failure Total risk Relative risk
44) The probability of failure, when cou- pled with the associated consequence of failure (cof) (seesection 11) will determine ………….associated with the equipment item, A. B. C.
Operating risk Ranking Residual risk
45) …………. Is a risk management activity that may lead to risk reduction. A. B. C.
Inspection Evaluation Analysis
46) The primary product of a rbi effort should be
A. B. C.
An inspection plan for each equipment item evaluated Mitigation plan for each equipment item evaluated Residual risk assessment plan for each equipment item evaluated
47) Following are some of the recognised risks which cannot be managed by inspection alone except one A. B. C. D.
Equipment nearing retirement. Failure mechanisms (such as brittle fracture, fatigue) where avoidance of failure primarily depends on operating within a defined pressure/temperature envelope. Consequence-dominated risks. The suitability and current condition of the equipment within the current operating envelope will determine the probability of failure (pof) of the equipment from one or more deterioration mechanisms.
48) Following are the non-inspection mitigation actions except one A. B. C. D.
Replacement or upgrade Equipment redesign Maintenance of strict controls on operating conditions Risk management by monitoring the deterioration
49) In the event of a leak the potential failure of an isolation valve could A. B. C.
Incerease the inventory Decrease the inventory No harm to inventory
50) Potential hazards identified in a pha will often affect the A. Probability of failure side of the risk equation. B. Consequence of failure side of the equation
51) Rbi may include methodolo- gies to assess the effectiveness of the management systems in maintaining A. B. C.
Mechanical integrity Total asset integrity Plant integrity
52) Equipment reliability is especially important if leaks can be caused by A. Secondary fail- ures, such as loss of utilities B. Primary failures such as leak due to severe corrosion C. Tertiary failures due to valve gland packing leak 53) Reliability efforts, such as reli- ability centered maintenance (rcm), can be linked with rbi, resulting in an integrated program to A. Reduce downtime in an operating unit. B. Reduce operating time of an unit C. To reduce risk by mitigation activities 54) In jurisdictions that permit the applica- tion of the api inspection codes and standards A. Rbi should be an acceptable method for setting inspection plans. B. Rcm should be an acceptable method for setting the inspection plans C. Pha 55) ……………to be established to judge acceptability of risk could be an objective of the rbi assessment if such criteria do not exist already within the user’s company. A. B. C.
Risk criteria Risk plan Risk analysis
56) ………………….. Is usually not the primary objec- tive of a rbi assessment, but it is frequently a side effect of optimization. A. B. C.
Reducing inspection costs Increasing inspection costs Increasing frequency of inspection programs
57) When the inspection program is optimized based on an understanding of risk, one or more of the follow- ing cost reduction benefits may be realized. Except one A.
Ineffective, unnecessary or inappropriate inspection activi- ties may be eliminated.
B. C.
Effective, necessary or appropriate inspection activi- ties may be eliminated. On-line or non-invasive inspection methods may be substi- tuted for invasive methods that require equipment shutdown. More effective infrequent inspections may be substituted for less effective frequent inspections.
D.
58) The following are the risks identified by rbi assessment that may be man- aged by actions other than inspection. Except one A. B. C. D.
Modification of the process to eliminate conditions driving the risk. Modification of operating procedures to avoid situations driving the risk. Chemical treatment of the process to reduce deterioration rates/susceptibilities. Identifing and detecting deterioration and predicting future deterioration states with advanced inspection technique(s).
59) For qualititive rbi analysis it iis important to establish a set of rules to assure consistency in A. B. C.
Categorization or classification Segregation Ranking
60) Generally, a qualitative analysis using broad ranges requires a …………………..from the user than a quantitative approach. A. B.
Higher level of judgment, skill and understanding Lower level of judgement, skill and understanding
61) The models are evaluated…………………..to provide both qualitative and quantitative insights about the level of risk and to identify the design, site, or operational characteristics that are the most important to risk. A. B. C. D.
Probabilistically Statistically Linearly Logically
63) Potential source of errors in rbi analysis regarding data quality are the following except a. b. c. d.
Assumptions in equipment history Outdated drawings and documentation Inspector error Advanced inspection methods
64) The following assumption can be made that significantly impact the calculated corrosion rate early in the equipment life A. B. C.
If the base line thickness were not performed the nominal thickness may be used for the original thcikness If original thickness not available, averaged ut thickness readings may be used If the original thickness not available, maximum ut thickness readings may be used
65)………………… may result in the calculated corrosion rate appearing artificially high or low. A.
Clerical error
B. C. D.
Measurement error Inspector error Ut scanning
66)The data validation step stresses the need for a knowledgeable individual A. To comparing data from the inspections to the expected deterioration mechanism and rates. B. To com-pare the results with previous measurements on that system, C. Similar systems at the site or within the company or published data. D. All of the above 67) the amount and type of codes and standards used by a facility can have A. B. C.
Significant impact on rbi results No impact on rbi results Less significant impact on rbi results
68)Who should be consulted to define the equipment deterioration mechanisms, susceptibility and potential failure modes. A. A metallurgist or corrosion specialist B. A metallurgist and corrosion specialist C. A metallurgist only D. Corrosion specialist only 69)------------------are the primary inputs into the probability of failure evaluation. A. B. C. D.
The deterioration mechanisms, rates and susceptibili-ties Loss of containment f fluid Fluid toxicity and its concentration Damage mechanisms and its severity
70)--------------------------is key to per-forming deterioration mechanism identification. A. Understanding equipment operation and the interaction with the chemical and mechanical environment. B. Understanding equipment operation and process upsets C. Understanding equipment operation and its safety protective measures
71)Who can provide useful input (such as the spectrum of process condi-tions, injection points etc.) To aid materials specialists in the identification of deterioration mechanisms and rates. A. B. C. D.
Process specialists Plant operation specialists Asset integrity experts Inspection engineers
72)Thinning causes the loss of material from
A. B. C.
External surfaces only Internal surfaces only External or internal surfaces
73) Ssc occurs when equipment is exposed to environments A. B. C.
Conducive to certain cracking mechanisms Unfavourable to certain cracking mechanisms Unbeneficial to certain cracking mechanisms
74)----------------are often necessary to establish susceptibility of equipment to stress corrosion cracking. A. B. C. D.
Literature, expert opinion and experience Cracking mechanisms Damage mechanisms Fluid toxicity and its constituents
75) ………………curves are referred for htha deterioration mechanism for carbon and low ally steel materials A. B. C.
Nelson curves Ph concentration curves Schmidtt curves for sulfide corrosion
76) Following are the critical variables for deterioration mechanism except A. B. C. D.
Material of construction Process operating Start up and shut down conditions Insulation
77) Following are the common mechanical deterioration mehanisms except A. B. C. D.
Fatigue Stress/creep rupture Tensile overload Intergranular corrosion
78)Depending on the methodology employed in qualitative analysis, the categories may be described with words such as A. High, medium or low or may have numerical descriptors. B. High, medium or low only C. Numerical discriptors only 79)When in accurate or insufficient failure data exists on the specific equipment item for quantative probability of faliure analysis then A. B. C.
General industry, company or manufacturer failure data used Process hazard analysis failure data may be used Process and toxic concentration analysis may be used
80)Deterioration rates can be expressed in terms of
A. B. C. D. E.
Corrosion rates for thinning or susceptability for mechasnisms where deterioration rate is unknown Corrosion rates for thinning on ly Immeasurable quantity Discrete numbers Susceptible rates only
81)Damage mechanisms where deterioration rates are immeasurable or unknown are A. B. C. D. E.
Stress corrosion cracking Hydrogen inducen cracking Thinning All of the above Both a and b
82)The ability to state the rate of deterioration precisely is affected by the following except A. B. C. D. E.
By equipment complexity Type of deterioration mechanism, process and metallurgical variations, Inaccessibility for inspection, limitations of inspection and test methods Lack of coverage of an area subject to deterioration. None of the above
83)The type of failure mode that likely to occur due to pitting A. B. C. D.
Small hole sized leaks Small holes to ruptures Cracks Catastrophic rupture
84)The type of failure mode that likely to occur due to ssc A. B. C. D.
Small holes to rupture Small holes Cracks Only rupture
85)The type of failure mode that likely to occur due to mechanical and metallurgical deterioration A. B. C. D.
Small holes to ruptures Cracks Catastrophic ruptures Leaks
86)The type of failure mode that likely to occur due thinning A. B.
Larger leaks or rupture Only rupture
C. D.
Metal loss Cracks
87)If a very aggressive acid is carried over from a corrosion resistant part of a system into a downstream vessel that is made of carbon steel, the result would be A. Rapid corrosion could result in failure in a few hours or days. B. General corrosion over a period of time could result in metal loss C. No deterioration will take place since carbon steel is resistent to aggressive acid 88)If multiple inspections have been performed, which inspection may best reflect current operating conditions. A. B. C. D.
Most recent inspection Base line inspection survey Process conditions Corrosion survey
89) Probability side of the risk equation is normally managed by A. B. C. D.
Plant inspectors or inspection engineers Maintenance planning engineers Process safety personnel Both a and b
90) Other functional failures are usually covered within A. B. C. D.
Rbi Rcm Pha Hazop
91) Following will cover the functional failures except A. B. C. D.
Heat exchanger tube failure Pressure relief device failure Rotating equipment failure Static equipment failure due to process environment
92)Qualitative consequence analysis of failure can be estimated separately for each unit, system, equipment group or individual equipment item. A. B. C. D.
On the basis of expert knowledge and experience On the basis of available data On the basis of process and environmental conditions No basis required since it is qualitative
93) Results of quantitative consequence analysis are usually expressed in A. B. C.
Numeric Ranges from high to low Frequency
D.
Occasion
94)In most consequence evaluations, a key element in deter-mining the magnitude of the consequence is A. The volume of fluid released. B. Amount of surface area exposed due to toxic release C. Physical area impacted by release 95) Following is the unit of measure of consequence that are least developed among those currently used for rbi assessment A. B. C. D.
Affected area Cost Enviromental damage Safety
96) Most of the damage from thermal effects tends to occur in A. B. C. D.
Close range Wide range Large distance None of the above
97) Toxic releases in rbi are only addressed when they affect A. B. C.
Personnel Equipment Process
98)The rbi program for environmental consequences, typically focuses A. B. C.
On acute and immediate envi-ronmental risks, rather than chronic risks from low-level emissions On acute and immediate chronic risks than immediate environmental risks Non threat environmental risks
99)The consequences of environmental damage are best understood by A. B. C. D.
Cost Release Volume of fluid Toxic concentration
100) Maintenance impact will generally be measured in monetary terms and typically includes:
A. B. C.
Repairs and equipment replacement Method of cleanup Safety systems
101) ………………..is a powerful tool that is being used by many companies, governments and regulatory authorities as one method in determining risk acceptance. A. B. C. D.
Cost-benefit analysis Risk analysis Cost consequence analysis Risk based cost analysis
102) Using risk assessment the inspections are prioritised based on A. B. C. D.
Risk value Risk matrix Risk consequence Risk failure
103) ………………….typically involves reviewing some or all input variables to the risk calculation to determine the overall influence on the resultant risk value. A. B. C. D.
Sensitivity analysis Risk analysis Process hazard analysis Safety risk analysis
104) ……………is an important part of the data validation phase of risk assessment. A. B. C. D.
Sensitivity analysis Risk analysis Probability analysis Process hazard analysis
105) The information gathering performed after the sensitivity analysis should be focused on developing A. B. C. D.
More certainty for the key input variables. Less cerainity for the key input variables No certainity for the key input variables None of the above
106) Too conservative assumptions made for the available or unavailabel data lead to overestimating consequences or probability of failure values will A. B. C. D.
Inflate the claculated risk values May mislead inspection planners, management and insurers Can create a lack of credibility for the user and the rbi process All of the above
107) Once the risk values are developed, one way of presenting results of the risk values are by A. B.
Risk matrix or plot Risk indicators
C. D.
Risk ranking Risk occurance
108) When the consequence category is given a higher weightage than the probability category then the risk matrix will be A. B. C. D.
Symmetrical Asymmetrical Logical None of the above
109) Highest risk ranking in the risk matrix is toward the Upper right corner of the matrix Upper left corner of the matrix Lower right corner of the matrix Lower left corner of the matrix 110) Once the risk plots have been completed then the risk plot or matrix can be used as …………… during the prioritization process A. B. C. D.
Screening tool Guideline tool Control line tool Risk determination tool
111) ………………policies influence the placement of risk thresholds A. B. C. D.
Corporate safety and financial policies Maintenance inspection policies Engineering design policies None of the above
112) A pressure vessel which is critical for operations,whose design pressure is 15 bar and its operating pressure under normal conditions vary from 6 bar to 10bar. The vessel is in sulphuric acid process environment. In due course of time after the vessel put into service for 10years, it subject to thinning due to sulphuric acid corrosion and found that localised corrosion upto 7mm( nominal thickness10mm, t-min-4mm). The vessel undergone rbi analysis and categorised under higher risk ranking, following are the best suitable mitigation action to be consired A. B. C. D. E.
Equipment to be decomissioned Equipment redesign Reduction of operating pressure acceptable to the process followed by cost effective inspection program with repair as indicated by the inspection results All of the above None of the above
113) The quality of the inspection data and the analysis or interpretation will greatly affect the A. B. C. D.
Level of risk mitigation Level of failure Level of prediction None of the above
114) Following are the tools critical to achiece risk mitigation through inspection
A. B. C. D.
Proper inspection methods Proper data analysis tools Both a and b All of the above
115) Which plays a major role in over all risk management strategy A. B. C. D.
Inspection Mitigation Consequence Failure
116) Which inspection technique for a piping circuit would be considered to have little or no benefit if the deterioration mechanism results in unpredictable local- ized corrosion A. B. C. D.
Spot thickness readings Ultrasonic readings Radiography All of the above
117) In the case of localised corrosion, which inspection technique is more effective A. B. C. D.
Ultrasonic for thickness monitoring Radiography Ultrasonic flaw detection None of the above
118) Which are the best cases that may cause deterioration and increase the risk of the equipment when managing the risk with inspection activities
A. B. C. D.
Moisture ingress to equipment leading to scc or poly- thionic acid cracking. Internal inspection of glass lined vessels. Risk associated with shutting down and starting up All of the above
119) ………………… be performed to determine what size flaws, if found in future inspections, would require repair or equipment replacement. A. B. C. D.
Fit- ness-for-service Rbi analysis Process hazard analysis All of the above
Questions completed upto 12.7 chapter
