Methods of inspecting Joints

1. With regards to radiographic examination of welded joints, API-650 considers plates to be the same thickness when the difference in their specified or design thickness is not greater than ____.

a) 1/32^nd inch b) 1/16^th inch c) 3/32^nd inch d) 1/8^th inch

Reference: API-650, Paragraph 6.1

2. Which of the following joints do not require radiographic examination?

a) Bottom-plate welds b) Shell butt welds

c) Flush-type connections with butt welds d) Annular-plate butt welds

Reference: API-650, Paragraph 6.1.1

3. Vertical butt welds in plates not greater than 3/8^th inch thick, require one spot radiograph to be taken in the first _____ of completed vertical joint of each type and thickness by each welder or welding operator.

a) 100 feet b) 50 feet c) 25 feet d) 10 feet

Reference: API-650, Paragraph 6.1.2.2(a)

4. One additional spot radiograph shall be taken in each additional ____ of vertical joint of the same type and thickness.

a) 10 feet b) 200 feet c) 100 feet d) 25 feet

Reference: API-650, Paragraph 6.1.2.2(a)

5. What percentage of the selected spot radiographs must be at junctions of vertical and horizontal welded joints?

a) 25 percent b) 50 percent c) 75 percent d) 15 percent

Reference: API-650, Paragraph 6.1.2.2(a)

6. For butt welded joints in plates over 3/8” to not over 1” in thickness are required to be radiographically examined to the same extent as plates 3/8” and less. What additional spot examination does API-650 require for these welded joints?

a) 50 percent of all vertical and horizontal junctions b) 75 percent of all vertical and horizontal junctions c) 100 percent of all vertical and horizontal junctions

d) 25 percent of all horizontal joints between the first and second course Reference: API-650, Paragraph 6.1.2.2(b)

7. The radiographic film for all junctions of vertical and horizontal joints shall show at least ____ of weld length on each side of the vertical intersection.

a) 3 inches b) 2 inches c) 1 inch d) 4 inches

Reference: API-650, Paragraph 6.1.2.2(b) and (c)

8. The butt weld around the periphery of an insert manhole or nozzle shall be ____.

a) Completely examined by liquid penetrant methods b) Completely examined by ultrasonic methods

c) Completely examined by magnetic particle methods d) Completely examined by radiographic methods Reference: API-650, Paragraph 6.1.2.2(d)

9. After the initial spot radiograph in the first 10 feet of horizontal butt joint, additional spot radiographs shall be taken at what increment?

a) One radiograph shall be taken in each additional 200 feet b) One radiograph shall be taken in each additional 100 feet c) One radiograph shall be taken in each additional 300 feet d) One radiograph shall be taken in each additional 150 feet Reference: API-650, Paragraph 6.1.2.3

10. What is the minimum weld length that must be clearly shown on each radiograph?

a) 2 inches b) 3 inches c) 6 inches d) 8 inches

Reference: API-650, Paragraph 6.1.2.8

11. Personnel who perform and evaluate radiographic examinations according to API-650 shall be qualified and certified by the manufacturer as meeting the requirements as generally outlined in _____.

a) Level II or Level III of ASNT SNAT-TC-1B b) Level II or Level III of ASNT SNT-TC-1B c) Level II or Level III of ASNT SNAT-TC-1A d) Level II or Level III of ASNT SNT-TC-1A Reference: API-650, Paragraph 6.1.3.2

12. The acceptance standards for radiographic examinations shall be in accordance with which of the following?

a) Paragraph UW-51(b) in Section VIII of the ASME Code b) Paragraph PW-51(b) in Section I of the ASME Code

c) Paragraph 341.3.2 in B31.3 Process Piping of the ASME Code d) Paragraph RB-3233 in the National Board Inspection Code (NBIC) Reference: API-650, Paragraph 6.1.5

13. If a section of weld is shown by a radiograph to be unacceptable under the provisions of API-650, paragraph 6.1.5 or the radiograph does not define the limits of the deficient welding, which of the following requirements apply?

a) One additional spot shall be taken and at least 3” of weld shall be represented b) Two spots adjacent to the section shall be examined by radiography

c) Two spots ten feet from each side of the original radiography shall be examined d) Two spots, chosen randomly by the purchaser’s inspector, shall be examined by

radiography

Reference API-650, Paragraph 6.1.6

14. After an aboveground storage tank is completed, what shall be done with the radiographs?

a) They shall become the property of the insurance company b) They shall become the property of the manufacturer c) They shall become the property of the purchaser d) They shall become the property of the API Reference API-650, Paragraph 6.1.8.2

15. According to API-650, magnetic particle examination shall be performed to a written procedure. The examiner shall have his/her vision checked and be able to read which of the following?

a) The magnetic particle written procedure at a distance not less than 12 inches b) A Jaeger Type 3 standard chart at a distance not less than 12 inches

c) A Jaeger Type 1 standard chart at a distance not less than 12 inches d) A Jaeger Type 2 standard chart at a distance not less than 12 inches Reference API-650, Paragraph 6.2.2 and 6.2.3 (a)

16. Ultrasonic examination shall be performed in accordance with a written procedure.

Examiners shall be qualified and certified by the manufacturer as meeting the requirements of certification as generally outlined in which of the following?

a) Level II or Level III of ASNT SNAT-TC-1B b) Level II or Level III of ASNT SNT-TC-1B c) Level II or Level III of ASNT SNAT-TC-1A d) Level II or Level III of ASNT SNT-TC-1A Reference API-650, Paragraph 6.3.2 and 6.3.3

17. Liquid penetrant examination shall be performed in accordance with a written procedure.

The examiner shall have his/her vision checked and be able to read which of the following?

a) The liquid penetrant written procedure at a distance not less than 12 inches b) A Jaeger Type 2 standard chart at a distance not less than 12 inches

c) A Jaeger Type 1 standard chart at a distance not less than 12 inches d) A Jaeger Type 3 standard chart at a distance not less than 12 inches Reference API-650, Paragraph 6.4.2 and 6.4.3 (a)

18. Undercutting of welds attaching nozzles, manholes, cleanout openings, and permanent attachments shall not exceed which of the following?

a) Undercutting shall not exceed 1/64^th inch b) Undercutting shall not exceed 3/32^nd inch c) Undercutting shall not exceed 1/32^nd inch d) Undercutting shall not exceed 3/64^th inch Reference API-650, Paragraph 6.5.1 (b)

Answers to API-Standard 650 Section 6, Methods of Inspecting Joints Question Number Answer

1 D 2 A 3 D 4 C 5 A 6 C 7 B 8 D 9 A 10 C 11 D 12 A 13 B 14 C 15 D 16 D 17 B 18 A