API 653 Exam Chapter 5

API 653 Exam Chapter 5 – Inspection Practices and Frequency

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1.

Q1. API 653: tank inspection intervals
Fundamentally, under the API methodology, how are the inspection intervals (both internal and external) for storage tanks decided?

 (a) They are based on the tables in API 653

 (b) They are based on local legislation (‘jurisdiction’)

 (c) They are based on the results of previous service history

 (d) They are based on the results of a mandatory RBI analysis

2.

Q2. API 653: tank external inspection intervals
What is the maximum period that API 653 specifies for an external inspection by an API-authorized tank inspector?

 (a) There is not one (it can vary depending on history, RBI results, etc.)

 (b) 5 years or 1/2 of the remaining corrosion life

 (c) 5 years or 1/4 of the remaining corrosion life

 (d) 10 years or 1/2 of the remaining corrosion life

3.

Q3. API 653: shell UT inspection intervals
What is the maximum period that API 653 specifies for UT thickness checking of the shell if the corrosion rate is not known?

 (a) There is not one (it can vary depending on history, RBI results, etc.)

 (b) 1 year

 (c) 2 years

 (d) 5 years

4.

Q4. API 653: shell UT inspection intervals
What is the maximum period that API 653 specifies for UT thickness checking of the shell when the corrosion rate is known and has been validated within the past 5 years?

 (a) 5 years

 (b) 15 years or 1/2 of the remaining corrosion life

 (c) 5 years or 1/4 of the remaining corrosion life

 (d) 10 years or 1/4 of the remaining corrosion life

5.

Q5. API 653: tank internal inspection intervals
Which part of the tank normally ‘controls’ the internal inspection interval?

 (a) The bottom

 (b) The lower courses of the shell

 (c) The fluid interface areas of the shell

 (d) The condition of the tank nozzle-to-shell wesld

6.

Q6. API 653: initial internal inspection intervals
What is the maximum period that API 653 specifies for the first internal inspection interval if a formally documented RBI evaluation has not been carried out?

 (a) 10 years

 (b) 20 years

 (c) 1/2 corrosion life if the corrosion rate is known, 20 years if it is not

 (d) 1/2 corrosion life if the corrosion rate is known, 10 years if it is not

7.

Q7. API 653: following inspection intervals
What is the absolute maximum internal inspection interval for a tank containing oil (following the initial one) under any scenario?

 (a) 20 years

 (b) 25 years

 (c) 30 years

 (d) There is not one

8.

Q8. API 653: interval exemptions
Tanks containing which of these products are exempt from API 653 maximum internal inspection intervals?

 (a) Light distillate

 (b) Asphalt

 (c) Crude oil

 (d) Toxic substances

9.

Q9. API 653: repair recommendations
Whose job is it to provide repair recommendations for tanks?

 (a) The examiner

 (b) The inspector

 (c) The owner/operator

 (d) All of the above

10.

Q10. API 653: NDE qualifications
Examiners doing NDE of tanks must be qualified according to the requirements of:

 (a) API 650

 (b) API 653 Appendix D

 (c) ASME V

 (d) ASME IX

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API 653: inspection intervals: practice questions

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