API 653 Question Bank (API 653 QB001)

1. A corroded area of a tank bottom plate is repaired by welding overlay. There is no change in the rating and no change is made on the nameplate. Which of the following is the correct term to describe this process?

a. Reconstruction 

b. Repair

c. Alteration

d. None of the above

12. The maximum interval between internal inspections shall not exceed ____ years when corrosion rate is known:

(a) 10;

(b) 20;

(c) 5;

(d) 15.

13. Hot taps are not permitted under which of the following conditions?

a. On plates requiring PWHT.

b. On ultrasonically sound plate

c. On tanks with dia. more than 80 feet.

d. None of the above.

14. A tank of 160 ft diameter is to be checked for shell settlement. Minimum number of equally spaced settlement points to be checked will be:

a. 16

b. 20

c. 24

d. 12

15. For a tank made by reconstruction, under what circumstances may a new shell-to-bottom weld be exempt from hydrostatic testing?

a.  When the root pass has been visually inspected and the final weld is fully examined, visually and radiographically.

b.  Reconstructed tank is never exempted from hydrostatic testing.

c.  When the root pass has been visually inspected and the final weld is fully examined, visually and by vacuum box.

d. When the welding method has been reviewed and approved by an engineer experienced in tank design in accordance with API Standard 650.

16. In atmospheric conditions, bottom coatings may be applied if the steel temperature is:

a. 2°F above the dew point

b. 5°F below the dew point.

c. 10°F above the dew point.

d. At the dew point.

17. Procedure qualification for welding during repair of tanks is done in accordance with:

a. AWS D1.1

b. API 1104

c. ASME Section IX

d. All of the above

18. Widely scattered pits may be ignored under the following conditions 

a. Where the service fluid is corrosive or hard to hold.

b. If sum of pit lengths along any 8” vertical line does not exceed 2”

c. When no pit has depth which results in the minimum thickness being less than one-half the minimum acceptable thickness of the shell plate exclusive of corrosion allowance

d. b and c

19. For verification of radiographic sensitivity and image quality, which of the following   are used:

a. Cassettes 

b. Penetrameters

c. Cameras

d. Collimators

20. Internal corrosion in the vapour space above liquid level occurs due to:

a. Hydrogen Sulphide vapour      

b. Water vapour 

c. Oxygen                                     

d. Any combination of the above three

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API 570 Question Bank (API 570 QB001)

Today's questions here.......

66) If a lower pressure test (lower than prescribed by code) is used only for tightness of piping systems, the __________ may designate the pressure

a) Owner-user

b) Inspector

c) Jurisdiction

d) Contractor

67) The preferred medium for a pressure test is __________:

a) Steam

b) Air

c) Water

d)  Hydrocarbon

68) If a non-toxic hydrocarbon (flammable) is used as the test medium, the liquid flash point shall be at least __________ °F or greater.

a) 95

b) 100

c) 110

d) 120

69) Piping fabricated of or having components of 300 series stainless steel should be tested with __________.

a) Water with a pH of 4

b) Water with a pH of 6

c) Water with a chloride content of less than 400 ppm chlorides

d) Steam condensates

70) For sensitised austenitic stainless steel, piping subject to polythionic stress corrosion cracking, consideration should be given to using __________ for pressure testing

a) An acidic-water solution

b) An alkaline-water solution

c) A water with a pH of 5

d) A water with a pH of 4

71) When a pipe requires post weld heat treatment, when should the pressure test be performed?

a) During heat treatment

b) Before any heat treatment

c) After any heat treatment

d) No test is required

72) During a pressure test, where test pressure will exceed the set pressure of the safety relieve valve or valves on a piping system, the safety relief valve or valves should be __________ when carrying out the test.

a) Altered by screwing down the adjusting screw

b) Reset to exceed the test pressure

c) Checked or tested

d) Removed or blanked

73) When using block valves to isolate a piping system for pressure test, what precaution should be taken?

a) Do not use a globe valve during a test

b) Make sure the packing gland of the valve is tight

c) Do not exceed the permissible seat pressure of the valve

d) Check the bonnet bolts to make sure they are tight

74) Several methods may be used to verify that the correct alloy piping is in a system. Pick the incorrect method from the list below:

a) Holography

b) Optical spectrographic analyser

c) X-ray fluorescent analyser

d) Chemical spot checking

75) Name a part of a piping system that thickness measurements are not normally routinely taken.

a) Elbows

b) Expansion loops

c) Tees

d) Valves

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API 570 Question Bank (API 570 QB001)

56) What is taken into account by an experienced inspector when selecting TMLs?

a) The amount of corrosion expected

b) The patterns of corrosion that would be expected

c) The number and the cost of reading the TMLs

d) Whether the TMLs are easily accessed

57) In theory, a piping circuit subject to perfectly uniform corrosion could be adequately monitored with __________ TMLs.

a) 1

b) 2

c) 3

d) 4

58) More TMLs should be selected for piping systems with any of the following characteristics:

a) Low potential for creating a safety or environmental emergency in the event of a leak.

b) More complexity in terms of fittings, branches, deadlegs, injection points, etc.

c) Relatively non-corrosive piping systems

d) Long, straight-run piping systems

59) Fewer TMLs can be selected for piping systems with any of the following characteristics:

a) More complexity in terms of fittings, branches, deadlegs, injection points, etc.

b) Higher expected or experienced corrosion rates

c) Long, straight-run piping systems

d) Higher potential for localised corrosion

60) TMLs can be eliminated for piping systems with the following characteristics:

a) Higher potential for creating a safety or environmental emergency in the event of a leak.

b) Low potential for creating a safety or environmental emergency in the event of a leak.

c) Extremely low potential for creating a safety of environmental emergency in the event of a leak.

d) More complexity in terms of fittings, branches, deadlegs, injection points, etc.

61) What is usually the most accurate means for obtaining thickness measurements on installed pipe larger than NPS 1?

a) MT

b) UT

c) PT

d) ET

62) What thickness measuring technique does not require the removal of some external piping insulation?

a) AE

b) UT

c) ET

d) RT

63) When ultrasonic thickness measurements are taken above __________ degrees F, instruments couplants, and procedures should be used that will result in accurate measurements at the higher temperature

a) 150

b) 175

c) 200

d) 250

64) Typical digital thickness gages may have trouble measuring thickness less than __________ inches.

a) 0.2188

b) 0.1875

c) 0.1562

d) 0.1250

65) When pressure testing of piping systems are conducted, they shall be performed in accordance with the requirements of:

a) ASME B31.3

b) ASME B&PV Code, Section VIII

c) SA B16.5

d) API 510

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API 510 Question Bank (API 510 QB001)

The question bank continues..........

12. Vessel MAWP for vertical vessel is measured at:

a. Top most point of vessel

b. Bottom most point of vessel

c. At the mid point between top & bottom

d. None of above

13. Which of the following statements is true? 

a. All defects are not discontinuities. 

b. All discontinuities are defects. 

c. Discontinuities are rejectable defects. 

d. Defects are rejectable discontinuities.

14. A Pressure Vessel is designed for 0.85 joint efficiency with full penetration welds. RT requirement will be:

a. Nil          

b. Spot        

c. 100 %        

d. T-joints radiography

15. A vessel with 50 inches OD and 1¼ in. thickness is to be provided Std. torisph. heads. The heads shall be formed with crown radius and min. knuckle radius as follows:

a. 25 inch,  4 inch

b. 50 inch,  3 inch 

c. 40 inch,  3¾ inch 

d. 25 inch,  2 inch 

16. If there is a conflict between ASME VIII & API 510 Code, for vessels in-service:

a. ASME will precedent

b. API will precedent 

c. ASNT will precedent

d. Owner user will decide

17.   Two head to shell joints, one joining a seamless Hemisph, head   to shell was radiographed for full length and the other joint joining seamless std. torisph. head to shell was spot radiographed, The weld joint efficiency for each of these heads respectively will be:

a. 1,  0.85              

b. 1,  1           

c. 0.85,  1              

d. 0.85,  0.85 

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API 570 Question Bank (API 570 QB001)

20) What is the best thing to do with deadlegs that are no longer in service?

a) Ultrasonically inspect often

b) Radiograph often

c) Inspect often

d) Remove them

21) What are the most common forms of corrosion under insulation (CUI).

a) Localised corrosion of non-ferrous metals and chloride stress corrosion cracking of carbon steel.

b) Localised corrosion of chrome-moly steel and chloride stress corrosion cracking of ferritic stainless steel.

c) Localised corrosion of carbon steel and chloride stress corrosion cracking of austenitic stainless steel

d) Localised corrosion of nickel-silicon alloy and caustic stress corrosion of austenitic stainless steel

22) What climatic area may require a very active program for corrosion under insulation?

a) Cooler northern continent locations.

b) Cooler direr, mid-continent locations

c) Warmer, marine locations

d) Warmer drier, desert locations

23) Certain areas and types of piping systems are potentially more susceptible to corrosion under insulation. Which of the items listed is not susceptible to CUI?

a) Areas exposed to mist over-spray from cooling water towers.

b) Carbon steel piping systems that normally operate in-service above 250 degrees but are in intermittent service.

c) Deadlegs and attachments that protrude from insulated piping and operate at a different temperature than the temperature of the active line.

d) Carbon steel piping systems, operating between 250 degrees F and 600 degrees F.

24) What location is subject to corrosion under insulation and inspection contributes to it?

a) Locations where pipe hangers and other supports exist.

b) Locations where insulator has been stripped to permit inspection of the piping.

c) Locations where insulation plugs have been removed to permit piping thickness measurements.

d) Locations where there is damaged or missing insulation jacketing.

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API 570 Question Bank (API 570 QB001)

See below today's questions:

5) Some of the classes of piping systems that are excluded or optional for coverage under API 570 are listed below. Which one is a mandatory included class?

a) Water                                                             

b) Catalyst lines               

c) Steam                                                             

d) Boiler feed water

6) The __________ shall be responsible to the owner-user for determining that the requirements of API 570 for inspection, examination, and testing are met.

a) Piping Engineer                          

b) Inspector

c) Repair Organisation                  

d) Operating Personnel

7) Who is responsible for the control of piping system inspection programs, inspection frequencies and maintenance of piping?

a) Authorised Piping Inspector                  

b) Owner-user

c) Jurisdiction                                                    

d) Contractor

8) An authorised piping inspector shall have the following qualifications. Pick the one that does not belong in this list:

a) Four years of experience inspecting in-service piping systems

b) High school education plus 3 years of experience in the design, construction, repair, operation, or inspection of piping systems

c) Two year certificate in engineering or technology plus 2 years of experience in the design, construction, repair, operation, or inspection of piping systems.

d) Degree in engineering plus one year experience in the design, construction, repair, operation, or inspection of piping systems

9) Risk based inspections include which of the following:

a) Likelihood assessment

b) Consequence analysis

c) Operating and inspection histories

d) All of the above

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