3. REALIDAD SOCIO DEMOGRÁFICA A LA REGIÓN DE LA ARAUCANÍA Y LA PROVINCIA DE
3.2. Población indígena y mapuche en Chile y Argentina
1. Bottom plates that will be reused shall be cut by de-seaming of lap-welds or by cutting alongside of the remaining welds at a minimum of _______ away from existing welds.
a) One inch b) Two inches c) Four inches d) Six inches
Reference API-653, Paragraph 8.3.2.1
2. Shell plates may be cut by any of the following methods except
a) Shell rings ½” thick or thinner can be dismantled by cutting through the weld without removing the heat affected zone
b) Cuts made a minimum of 6” away from existing welds except where cuts cross existing welds
c) Cuts made a minimum of 2” away from existing welds except where cuts cross existing welds
d) Any shell ring may be dismantled by cutting out existing weld seams and the heat affected zone of the weld
Reference API-653, Paragraph 8.3.3.1
3. API-653 requires that new vertical joints in adjacent shell courses not be in alignment.
What is the minimum offset dimension of these joints?
a) Vertical joints shall be offset a minimum of 5 inches or 5t which ever is greater b) Vertical joints shall be offset a minimum of 5t where t is the plate thickness of the
thicker course at the point of offset
c) Vertical joints shall be offset a minimum of 5t where t is the plate thickness of the thinner course at the point of offset
d) Vertical joints shall be offset a minimum of 5 inches or 5t which ever is less Reference: API-653, Paragraph 8.4.2.1
4. Roof plates shall be cut by de-seaming of lap-welds or by cutting alongside of the remaining welds at a minimum of _______ away from existing welds.
a) One inch b) Two inches c) Four inches d) Six inches
Reference API-653, Paragraph 8.3.4.1
5. In the reconstruction of aboveground storage tanks, welding shall be by any of the following welding processes except.
a) Submerged arc welding b) Oxyfuel
c) Gas metal-arc d) Forging
Reference API-653, Paragraph 8.4.2.2 and API-650 5.2.1
6. No welding of any kind may be performed when the surfaces to be welded are wet from rain, snow, or ice. When rain or snow is falling or during high wind conditions, welding is permitted provided:
a) The welder is secured to an anti-fall device and the work is properly grounded b) The welder has agreed to work in such conditions
c) The welder and the work are properly shielded
d) The owner/operator takes full responsibility for the safety of the welder and the quality of the welds
Reference API-653, Paragraph 8.4.2.3
7. According to API-653, no welding is permitted when the temperature of the base metal is below what value?
a) Base metal temperature below -20°F b) Base metal temperature below 0°F c) Base metal temperature below 20°F d) Base metal temperature below 30°F Reference API-653, Paragraph 8.4.2.3
8. If the base metal is greater than 1” thickness or the temperature of the base metal is between 0°F and 32°F what requirement does API-653 stipulate?
a) The base metal within 3 inches of the weld area shall be heated to a temperature that is warm to the hand (approximately 180°F)
b) The base metal within 8 inches of the weld area shall be heated to a temperature that is warm to the hand (approximately 140°F)
c) The base metal within 3 inches of the weld area shall be heated to a temperature that is warm to the hand (approximately 140°F)
d) The base metal within 8 inches of the weld area shall be heated to a temperature that is warm to the hand (approximately 180°F)
Reference API-653, Paragraph 8.4.2.3
9. What is the maximum permissible undercut of the base metal for vertical joints?
a) 1/64 b) 1/32 c) 1/19 d) 1/16
Reference API-653, Paragraph 8.4.2.5
10. What is the maximum permissible undercut of the base metal for horizontal joints?
a) 1/64 b) 1/32 c) 1/19 d) 1/16
Reference API-653, Paragraph 8.4.2.5
11. What is the maximum weld reinforcement thickness permitted on each side of the plate for a plate, which is 7/8” thick?
Vertical joints Horizontal joints
a) 3/32” 1/8”
b) 1/8” 3/16”
c) 3/16” 1/4
d) 1/4 5/16”
Reference API-653, Paragraph 8.4.2.6 & Table 8-1
12. Tack welds used in the assembly of vertical joints in tank shells may remain in place when the joints are welded manually provided:
a) They are properly cleaned of all weld slag b) They are sound
c) Liquid Penetrant or Magnetic Particle examination is performed d) They shall not remain
Reference API-653, Paragraph 8.4.2.7
13. What are the requirements for making tack welds according API-653?
a) If the tack weld is to be removed, it must be made using qualified weld procedure and qualified welder
b) If the tack weld is to remain in place, it must be made using qualified weld procedure and qualified welder
c) If the tack weld is to remain in place, it may be made using any weld procedure acceptable to the owner/operator
d) If the tack weld is to be removed, it may be made by any welder wishing to gain experience provided the process is the SMAW process
Reference API-653, Paragraph 8.4.2.7
14. All coatings must be removed from the weld area prior to welding except weldable primer coatings. What must done if these primer coatings are used?
a) Weldable primer coatings must also be removed
b) If the coating is applied by brush it may remain provided the application is performed to a written procedure
c) They shall be included in welding procedure qualification tests for brand, formulation, and maximum thickness of primer applied
d) They shall be included in welding procedure qualification tests for the method of application either by brushing or by spraying or a combination of the two.
Reference API-653, Paragraph 8.4.2.8
15. When welding tank bottoms, when should the shell-to-bottom weld be completed?
a) This joint (except for door sheets) can be welded as soon as the bottom plates are laid out and welded
b) This joint (except for door sheets) shall be welded as soon as the first bottom weld joint is completed to prevent distortion
c) This joint (except for door sheets) shall be welded as work progresses around the tank bottom
d) This joint (except for door sheets) shall be completed before the welding of bottom joints
Reference API-653, Paragraph 8.4.3.2
16. What is the maximum permissible misalignment of vertical joints in shell plates that are .9375” thick?
a) .125”
b) .09375”
c) .009375”
d) .0125”
Reference API-653, Paragraph 8.4.4.1
17 What is the maximum permissible misalignment of vertical joints in shell plates that are .625” thick?
a) .0625”
b) .00625”
c) .125”
d) .0125”
Reference API-653, Paragraph 8.4.4.1
18. Vertical joints shall be completed before the lower horizontal weld is made.
a) True b) False
Reference API-653, Paragraph 8.4.4.1
19. In completing horizontal joints, what is the maximum projection of the upper plate, beyond the face of the lower plate, at any point for plate thickness of 1.125”
a) .25”
b) .225”
c) .125”
d) .0125”
Reference API-653, Paragraph 8.4.4.2
20. When welding horizontal and vertical joints constructed of material that is over 1.5”
thick, based on the thickness of the thicker part, what is the required preheat temperature?
a) Preheating is not required b) 140°F
c) 200°F d) 300°F
Reference API-653, Paragraph 8.4.4.3
21. When shall measurements be taken to verify tolerances of reconstructed tanks?
a) After hydrostatic testing b) Before hydrostatic testing c) After lay out of all plates
d) After fit-up and tack welding used for alignment purposes Reference API-653, Paragraph 8.5.1.2
22. What is the maximum out-of-plumbness of the top of the shell relative to the bottom of the shell of a tank with a total height of 62.25 feet?
a) 7.47”
b) .6225”
c) 6.25”
d) 5”
Reference API-653, Paragraph 8.5.2.1
23. An aboveground storage tank is 115 feet in diameter. What is the maximum or minimum radius permitted measured at one foot above the shell-to-bottom weld?
Maximum Minimum
a) 115.75” 114.25”
b) 690.75” 689.25”
c) 1380.75” 1379.25”
d) 115.5” 114.5”
Reference API-653, Paragraph 8.5.3
24. An aboveground reconstructed tank is 126.5 feet in diameter. What is the maximum or minimum radius permitted measured at the second shell course up from the bottom?
Maximum Minimum
a) 759.75” 758.25
b) 761.25” 756.75”
c) 1520.25” 1515.75”
d) 128.75” 124.25”
Reference API-653, Paragraph 8.5.3
25. Peaking shall not exceed ½”. This is measured using a horizontal sweep board of what dimensions?
a) The sweep board shall be 48” long and made to the true outside radius of the tank b) The sweep board shall be 48” long and made to the true inside radius of the tank c) The sweep board shall be 36” long and made to the true outside radius of the tank d) The sweep board shall be 36” long and made to the true inside radius of the tank
Reference API-653, Paragraph 8.5.4
26. Banding shall not exceed ____ with a vertical 36” long sweep board.
a) One half inch b) Three quarter inch c) One inch
d) One and one eighth inch
Reference API-653, Paragraph 8.5.5
27. The top of the concrete ringwall of a reconstructed tank, that is 115 feet in diameter, must be level within ± 1/8” in any 30 feet of circumference. What is the tolerance measured from the average elevation?
a) ±1/8”
b) ±3/16”
c) ±1/2”
d) ±1/4”
Reference API-653, Paragraph 8.5.6.2(a)
28. Where concrete ringwalls are not provided, the foundation under the shell shall be level to within what tolerances?
a) ±1/8” in any 30’ of the circumference and ±1/2” in the total circumference measured from the average elevation
b) ±1/8” in any 10’ of the circumference and ±1/2” in the total circumference measured from the average elevation
c) ±1/8” in any 10’ of the circumference and ±1/4” in the total circumference measured from the average elevation
d) ±1/8” in any 30’ of the circumference and ±1/4” in the total circumference measured from the average elevation
Reference API-653, Paragraph 8.5.6.2(b)
29. For foundations specified to be sloped from a horizontal plane, the actual elevation shall not deviate from the calculated differences by more than which of the following where concrete ringwalls are provided?
a) ±1/8” in any 30’ of the circumference and ±1/4” in the total circumference measured from the average elevation
b) ±1/8” in any 10’ of the circumference and ±1/2” in the total circumference
c) ±1/8” in any 10’ of the circumference and ±1/2” in the total circumference measured from the average elevation
d) ±1/8” in any 30’ of the circumference and ±1/4” in the total circumference Reference API-653, Paragraph 8.5.6.3(a)
30. For foundations specified to be sloped from a horizontal plane, the actual elevation shall not deviate from the calculated differences by more than which of the following where concrete ringwalls are not provided?
a) ±1/8” in any 30’ of the circumference and ±1/2” in the total circumference measured from the average elevation
b) ±1/8” in any 10’ of the circumference and ±1/2” in the total circumference
c) ±1/8” in any 10’ of the circumference and ±1/2” in the total circumference measured from the average elevation
d) ±1/8” in any 30’ of the circumference and ±1/4” in the total circumference Reference API-653, Paragraph 8.5.6.3(b)
Answers to API-653 Section 8, Dismantling & Reconstruction
Question Number Answer
1 b
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Section 9 - Welding
1. Welding procedure specifications and welders and welding operators shall be qualified in accordance with __________.
a) Original code of construction b) Owner/operator’s specification c) Section IX of the ASME Code d) Repair organization’s specifications Reference API-653, Paragraph 9.1.1
2. According to API Standard 653, if the material specification for the steel from an existing tank is unknown or obsolete what must be done?
a) The material can not be used for tank reconstruction
b) Test coupons for the WPS shall be taken from the actual plate to be used c) Test coupons for the WPS may be taken from a similar material of known
specification
d) Test coupons for the WPS shall only be taken from weld filler metal and not from the base metal
Reference API-653, Paragraph 9.1.2
3. Each welder and welding operator shall be assigned ________.
a) Only one joint to ensure traceabilitiy b) A specific welding machine
c) An identifying number, letter, or symbol d) Weld joints on only one side of the tank Reference API-653, Paragraph 9.2.1
4. How does each welder and welding operator identify the welds produced by them?
a) Each welder and welding operator’s identification mark shall be hand or machine stamped adjacent to each completed weld.
b) Each welder and welding operator shall inform the owner/operator which welds he or she completed
c) Each welder and welding operator shall show the inspector exactly which welds they completed
d) Each welder and welding operator shall inform the owner/operator which welds they will be making prior to the start of such welding
Reference API-653, Paragraph 9.2.2
5. At what intervals must the welder and welding operator’s identification be stamped adjacent to the completed welds?
a) Identification shall be at intervals not to exceed 9 feet b) Identification shall be at intervals not to exceed 7.5 feet c) Identification shall be at intervals not to exceed 6 feet d) Identification shall be at intervals not to exceed 3 feet Reference API-653, Paragraph 9.2.2
6. In lieu of stamping, a record may be kept that identifies the welder or welding operator for each welded joint.
a) True b) False
Reference API-653, Paragraph 9.2.2
7. What welds do not require welder’s identification?
a) All welds require identification
b) Vertical welded joints which are located within the final shell course since this course will be subjected to relatively low stresses
c) Roof plate welds and flange-to-nozzle-neck welds d) Roof plate welds and bottom plate welds
Reference API-653, Paragraph 9.2.2