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minimum remaining thickness in accordance with 4.4.5. During any

examination to determine corrosion rates the owner/operator should ensure they understand the effectiveness of the inspection techniques employed for detecting and measuring potential damage mechanisms. When changing service, an owner/operator may decide to use internal corrosion rates

obtained from similar service assessment (performed per Annex H of API 653) when setting subsequent internal inspection dates.

When using the corrosion rate procedures of 6.4.2.2.1 the maximum

subsequent internal inspection interval shall be 20 years for tanks without a Release Prevention Barrier, or 30 years for tanks with a Release Prevention Barrier.

Q12. What is the minimum thickness permitted at the next inspection for a

tank bottom designed with a means to provide detection and containment of a bottom leak?

a) 0.01 inch b) 0.10 inch c) 0.50 inch d) 0.05 inch

Reference: API-653 Paragraph 6.4.2.1 & Table 6.1

Q13. In cases where corrosion rates are not known and similar service experience is not available, the bottom plate actual thickness shall be determined by inspection(s) within how many years?

a) 25 years b) 20 years c) 15 years d) 10 years

Reference: API-653 Paragraph 6.4.2.2

Q14. Which of the following is a recognized alternative to internal inspection interval described in API-653?

a) Risk-based Inspection procedures (RBI)

b) Hydrostatically testing the tank every five years

c) Performing complete calculations for minimum required thickness of the tank shell and bottom

d) API-653 does not permit any alternatives to the internal inspection intervals

Reference: API-653 Paragraph 6.4.3

Q15. Of the following, which would not be a factor to be considered in a Risk-based assessment of a tank?

a) Availability and effectiveness of inspection methods and quality of data collected

b) The methods used for determining the thickness of the shell and bottom plates

c) Effectiveness of corrosion mitigation methods

d) Names of all operators since the initial start-up of the tank Reference: API-653 Paragraph 6.4.3

Q16. The owner/operator is required to maintain complete record file

consisting of three types of records. Which of the following is not one of the three types of records.

a) Repair/alteration history b) Fill cycles

c) Construction d) Inspection

Reference: API-653 Paragraph 6.8.1

Q17. General inspection reports shall include which of the following?

a) Metal thickness measurement, repairs, conditions found, settlement measurements, and recommendations

b) Metal thickness measurement, repairs, operational upsets, settlement measurements, and recommendations

c) Metal thickness measurement, repairs, conditions found, name of organization performing environmental impact study, and

recommendations

d) Metal thickness measurement, list of all personnel who have worked on the tank since the last inspection, conditions found, settlement

measurements, and recommendations Reference: API-653 Paragraph 6.9.2

Answers to API-653 Section 6, Inspection

Section 7 – Materials

Q1. All new materials used for repair, alteration, and reconstruction shall conform to which of the following?

a) The existing material code at the time of original construction b) The latest NFPA Code

c) The current applicable tank standards

d) Any ASME Code specification for P-1 material Reference: API-653, Paragraph 7.2

Q2. All shell plates and bottom plates welded to the shell shall be identified.

Material identified by any of the following except _____ does not require further identification?

a) Original contract drawings b) API name plates

c) Suitable documentation

d) Owner/operator's experience with similar tanks in similar service constructed of similar material

Reference: API-653, Paragraph 7.3.1.1

Q3. Each individual plate for which adequate identification can not be made;

the plate shall be _______.

a) Subjected to chemical analysis and mechanical tests as required in ASTM A6 and A370 including Charpy V-Notch

b) Subjected to chemical analysis and mechanical tests as required in ASTM A20 and A333 including Charpy V-Notch

c) Subjected to Brinell hardness analysis and mechanical tests as required in ASTM A6 and A370 including Charpy V-Notch

d) Subjected to Brinell hardness analysis and mechanical tests as required in ASTM A20 and A333 including Charpy V-Notch

Reference: API-653, Paragraph 7.3.1.2

Q4. Under what condition does API-653 require two tension specimens shall be taken at right angles to each other from a corner of each plate? One of those specimens must meet the specification requirements.

a) When the direction of rolling is not definitely known

b) When the welding will be conducted at a temperature less than 32ºF

c) When the plate is not a full size plate and may be installed with the grain running vertical

d) When the material is not a P-1 material Reference: API-653, Paragraph 7.3.1.2

Q5. Even when a material is identified, all shell plates and bottom plates welded to the shell shall meet what minimum requirements?

a) The chemistry and mechanical properties of material specified for the application with regard to thickness and design temperature given in ASME Section II, Part A

b) The chemistry and mechanical properties of material specified for the application with regard to thickness and design temperature given in API Standard 650

c) The chemistry and mechanical properties of material specified for the application with regard to thickness and design temperature given in the owner/operator's engineering design

d) The chemistry and mechanical properties of material specified for the application with regard to thickness and design temperature given in the contract for the tank repair, alteration, or reconstruction

Reference: API-653, Paragraph 7.3.1.3

Q6. Is it permissible to reuse existing rolled structural shapes? If so what specification applies?

a) Yes, existing rolled structural shapes shall meet the requirement of ASTM A-20 as a minimum

b) Yes, existing rolled structural shapes shall meet the requirement of ASTM A-370 as a minimum

c) Yes, existing rolled structural shapes shall meet the requirement of ASTM A-6 as a minimum

d) Yes, existing rolled structural shapes shall meet the requirement of ASTM A-7 as a minimum

Reference: API-653, Paragraph 7.3.2

Note:

ASTM A6 / A6M - 14 Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling

API653: 7.3.2 Structural

Existing rolled structural shapes that are to be reused shall meet the requirement of ASTM A7 as a minimum. New structural material shall meet the requirements of ASTM A36 or ASTM A992 as a minimum.

NOTE ASTM A7 was a steel specification that was discontinued in the Fourth Edition of API 650, 1970.

API653: 7.3.2 Structural

Existing rolled structural shapes that are to be reused shall meet the requirement of ASTM A7 as a minimum. New structural material shall meet the requirements of ASTM A36 or ASTM A992 as a minimum.

NOTE ASTM A7 was a steel specification that was discontinued in the Fourth Edition of API 650, 1970.

Q7. Flange material must meet the minimum requirements of the material specifications of the current applicable standard.

a) True b) False

Reference: API-653, Paragraph 7.3.3.1 API653: 7.3.3 Flanges and Fasteners

7.3.3.1 Flange material shall meet the minimum requirements of the material