1. The definition of ductility in metal is;
a. The ability to fail smoothly with minimum elongation.
b. The ability to deform plastically with deformation.
c. The ability to deform plastically with out rupture.
d. The ability to deform with rupture.
2. The reason a plate retains it shape after rolling is:
a. It is welded in place.
b. The outer fibers of the metal are stretched beyond the ultimate tensile strength.
c. The outer fibers of the metal are stretched beyond the elastic limit of the metal.
d. The inner fibers of the metal are stretched beyond the elastic limit of the metal.
3. Which of the following utilizes direct visual inspection?
a. Radiography.
b. Ultrasonics.
c. Eddy current.
d. Dye penetrant.
4. When determining the Maximum Allowable working pressure for a vessel in corrosive service which of the following is the correct wall thickness to use in the required calculations?
a. The as measured thickness, minus the expected corrosion loss before the date of the next inspection..
b. The as measured thickness, minus twice the expected corrosion loss before the date of the next inspection.
c. The as measured thickness minus three times the expected corrosion loss before the date of the next inspection
d. May be a, b, or c above depending on circumstances.
5. In the Standard Practice For Measuring Thickness by the Manual Ultrasonic pulse Echo Method SE 797 the scope statement includes an temperature limit which is ______________
a. 250 ºF b. 200 ºF c. 50 ºF d. 150 ºF
6. Which of the following is not re-rating a vessel a. Increasing the MAWP.
b. Increasing the maximum design temperature.
c. Increasing the RV settings above the marked MAWP.
d. Adding a 4‖ nozzle to a vessel which has other 4‖ nozzles.
7. Hammer testing is not advisable when a vessel;
a. Is suspected of having very thin areas.
b. Is made of a soft metal such as aluminum.
c. Is under pressure
d. Has a flange face exposed.
8. Requalification by written exam is required for an API inspector who has not been actively engaged in API inspections in the past;
a. One year.
b. Two years.
c. Three years d. Four years.
9. For alteration or repairs, half bead/temper bead welding may be used as an alternative for post weld heat treatment on vessels that require notch toughness tests, but is limited to;
a. P No. 1 b. P No. 3.
c. P Numbers 1,3, and 4 steels.
d. P Numbers 3 and 1 but are restricted to certain group numbers.
10. The mechanical working of weld metals using impact blows is defined as;
a. Hammering.
b. Forge welding.
c. Impact conditioning.
d. Peening.
11. The maximum inspection interval for a vessel with a remaining life of 16 years is;
a. 10 years.
b. 5 years.
c. 8 years.
d. 16 years.
12. A crack at a stress concentration must not be repaired without the permission of the;
a. The unit engineer.
b. A pressure vessel engineer.
c. A professional engineer d. Plant Manager.
13. If a pressure test is deemed necessary by the API inspector, it shall be at a pressure that;
a. Conforms to the construction code used to establish the vessel‘s MAWP.
b. Does not exceed the set pressure of the lowest relief device.
c. Is always 1.5 times the MAWP.
d. Allows for the weight of the testing fluid.
14. All pressure relieving devices must be tested and repaired by;
a. The original valve manufacturer.
b. The Authorized Inspector.
c. A repair concern which holds the NBIC VR symbol.
d. A repair concern experienced in valve maintenance.
15. Sometimes it is allowed to substitute a higher preheat as an alternative to PWHT, if this is done a;
a. Professional engineer must be consulted.
b. The authorized inspector must perform UT readings.
c. Metallurgical review must be performed.
d. Two PQRS must be completed.
16. If stresses are high in a vessel and reversals are frequent the vessel may fail because of;
a. Embrittlement.
b. Stress corrosion cracking c. Fatigue.
d. Creep.
17. If distortion of a vessel’s parts are suspected;
a. It should be shut down immediately.
b. The overall dimensions of the vessel‘s parts should be checked and compared to original design details.
c. It should be subjected to profile radiography.
d. It should be decommissioned and scrapped.
18. When calculating the MAWP of a vessel after it is in service, the resulting MAWP from these calculations cannot be higher than the original MAWP unless;
a. The actual thickness as determined by inspection is used in calculations b. The actual thickness minus any expected corrosion loss before the next
inspection date is used in calculations.
c. The actual thickness is minus twice any expected corrosion loss before the next inspection date is used in calculations.
d. A re-rating is performed per paragraph 7.3 of the API 510 Code.
19. The minimum actual thickness and maximum corrosion rate for any part of a vessel may be;
a. Estimated.
b. Adjusted at any inspection.
c. Changed to fit production schedules.
d. Ignored if the vessel is not operating at pressures above 30 psig.
20. Per API 510 the definition of actual thickness for determining MAWP of a vessel is;
a. The as measured thickness less 2 times the present corrosion rate.
b. The most critical value of the average thickness that has been determined.
c. The as measured thickness.
d. The original thickness less the original corrosion allowance.
21. When measuring the thickness of a corroded area of a ellipsoidal head, the governing thickness may be as follows;
a. The thickness of the serrated region.
b. The thickness of the skirt of the head.
c. The wall reading at the spin hole within the head.
d. The thickness of the knuckle and/or the spherical regions.
22. The API authorized inspector shall not approve repairs to a vessel until;
a. After inspection has proven the repairs have been satisfactorily completed and all required pressure test have been performed and witnessed.
b. He has satisfied himself that the repairs have been completed.
c. Item b above plus all isolation steps used before the pressure test have been removed and the vessels have been returned to an operable condition.
d. He has been given permission by the plant manager.
23. All repair and alteration welding must be performed in accordance with;
a. Acceptable company standards.
b. API approved welding procedures
c. The applicable requirements of the ASME Code or another Code of construction to which the vessel was built.
d. NBIC.
24. Vessels with the following dimensions are exempt from both the API 510 and the ASME Section VIII codes
a. Vessels with an internal or external working pressure of not more than 50 psi with a limit on size.
b. Vessels with an internal or external working pressure of not more than 15 psi with a limit on size.
c. Vessels with an internal or external working pressure of not more than 50 psi with no limit on size.
d. Vessels with an internal or external working pressure of not more than 15 psi with no limit on size.
25. Of the following which indicates a very acidic pH measurement?
a. 7.0 b. 8.5 c. 3.5 d. 6.0
26. Define re-rating according to the API 510 Code.
a. A change in either the temperature ratings or the maximum allowable working pressure rating or change in both.
b. Replacement of parts with those rated at a higher pressure and temperature than original design.
c. Replacement of a part with and identical component.
d. A change in the operating flows in the vessel above the original design.
27. A Permissible way to allow for corrosion in a vessel is to;
a. Place epoxy liners in the corroded area.
b. Increase safety device settings.
c. Re-rate below original design conditions.
d. Lower temperature and increase pressure on parts of the vessel not in question.
28. According to API 510 when would a repair constitute a rerating?
a. The repair changes the design pressure.
b. The repair changes the design temperature.
c. The repair changes the design pressure and/or the design temperature.
d. A new name plate stating a new design pressure or temperature.
29. What is the most important method of vessel inspection?
a. Radiographic profile surveys.
b. Ultrasonic onstream inspections.
c. Thermograph surveys.
d. Careful visual survey and inspections.
30. What metals might be subject to brittle fracture even at room temperature?
a. Carbon Steel.
b. Low Alloy Steel c. Some Ferritic Steels.
d. Carbon, Low alloy and Ferritic steels
31. Before an inspection starts in a vessel, who else besides the safety man should be informed?
a. Co-workers who will assist in the inspection.
b. Operations dept c. Repair concerns.
d. All persons working in the area of the vessel
32. A used vessel has been bought and moved to a new site and installed.
What must the inspector do before certification of the vessel for operation?
a. Insure that complete set of drawings is generated nothing areas of special interest.
b. An internal inspection
c. Make sure that the vessel is properly supported and do a complete hydrostatic test.
d. Witness a pneumatic pressure test.
33. A New weld repair project is just starting, as the inspector you should review the
a. The repairs concerns quality plan.
b. The procedures (WPR) (PWR).
c. The materials chemical test reports, as they become available d. Welder‘s certifications, the welding procedures, and the MTRs.
34. Who should be consulted with if an alteration is planned for a section VIII Div.1.vessel?
a. A professional engineer b. The NBIC inspector.
c. The department engineer over production
d. A pressure vessel engineer experienced in pressure vessel design.
35. What Codes may be used to determine a vessel’s MAWP?
a. The latest edition of the ASME Code or the construction Code to which the vessel was built.
b. The latest edition of the ASME Code or the edition of the ASME Code used for construction.
c. The API 510
d. The alternative rules of section VIII Div 2
36. If deciding on a technique(s) to use to inspect a vessel you must consider;
a. The condition of the vessel and when the last inspection was.
b. The condition of the vessel during the last inspection.
c. The condition of the vessel and the environment under which it operates d. The latest operational data such as logs.
37. The period between internal inspections or on-stream inspections shall not exceed;
a. The quarter corrosion rate life b. One –half the corrosion rate life.
c. The estimated remaining life of the vessel or based on the corrosion rate or 10 years which ever is which ever is less
d. One –half the estimated remaining life of the vessel or based on the corrosion rate or 10 years which ever is less.
38. A repair to restore missing, removed or corroded clad or overlay must by approved by;
a. The pressure vessel engineer.
b. The API inspector
c. Both the pressure vessel engineer and the API inspector d. A professional engineer. d. Dye penetrant examination
40. The spherical radius R to be used for the calculation of a standard torispherical head’s corrosion in it central dished portion is;
a. The diameter of the shell.
b. 80% of the shell‘s diameter.
c. The equivalent radius of the shell.
d. 80% of the heads diameter.
41. When repairing a vessel using welding by the half-bead / temper bead technique when notch toughness is not a requirement, you may use the;
a. Shielded metal arc welding with the 7018 electrode only.
b. Gas metal arc welding with S70 sold core wire only.
c. Gas tungsten arc welding with E309 through E316 rod only.
d. Shielded metal, Gas metal and/or Gas Tungsten arc welding processes.
42. A vessel due to corrosion has a remaining thickness that is below the minimum required thickness. If the thinned areas are to be evaluated for continued service using the design by analysis methods of Section VIII Division 2. When this approach is used it is always true that;
a. The NBIC Authorized Inspector must be consulted.
b. Operations must agree.
c. Consultation with a pressure vessel engineer experienced in pressure vessel design is required.
d. The materials used in the fabrication of the vessel and their notch toughness must be known.
43. A welded repair to a vessel in planned, which of the following statements does not apply to this situation?
a. The welding procedures must be qualified.
b. The welders performing the work must pass a performance qualification test to Section IX.
c. Consultation with a pressure vessel engineer may be required.
d. The parts to be welded cannot be below 35º F
44. Which of the following items should not be included in a fully documented quality control program for pressure relief devices?
a. Organizational chart, Statement of authority and responsibility, Repair and Inspection program.
b. Organizational chart, Statement of authority and responsibility, welding, non-destructive examination procedures and heat treatment.
c. Organizational chart Statement of authority and responsibility general example of valve‘s repair name plate.
d. The maximum set pressure for each rupture disk device.
45. As regards corrosion evaluation of a vessel part which contains a butt weld how far on each side the weld does the welded joints efficiency E extend when performing minimum thickness required calculations?
a. 1 inch
b. 1 inch or twice the minimum thickness of the weld which ever is less c. 1 inch or twice the minimum thickness of the shell which ever is greater.
d. This is not allowed the entire vessel part must be evaluated using the E of the affected butt joint.
46. Plate that has been rolled into a cylinder retains its shape, this is because;
a. It is not a spring
b. Plastic deformation has occurred
c. It has been stretched beyond its elastic point.
d. It has experienced the Bolinger effect.
47. You inspected a weld and it conforms to the minimum requirement’s of the construction codes, but you rejected it because you learned that;
a. The welding procedure was too old.
b. The welder tested in accordance with section X not Section IX.
c. The procedure was qualified to ASME section IX not API 510 d. The procedure had not been qualified to Section IX
48. The pulse echo contact method can be applied to any material in which ultrasonic waves will propagate at a ________________ throughout the part, and from which back reflections can be obtained and resolved.
a. Varying velocity b. Constant velocity
c. Constant velocity with attenuation d. Varying velocity with attenuation
49. A welding electrode has the following marking E-7018-1. Explain the meaning of the number-1 on the end.
a. The first lot of 7018 electrodes produced that month at the plant.
b. The electrodes are certified to be moisture free.
c. The electrodes have passed testing which allows use in certain impact tested vessel fabrications, without further testing of the weld metal.
d. First quality electrode according to the Section IX.
50. Using the contact pulse echo method of ultrasonic thickness examination the basic formula for the instrument uses to calculate thickness is ________________________
a. T = Vt/3 b. T = Vt/2 c. T = ½ Vt/3 d. T = ¼ Vt/2
51. Notch toughness is defined as;
a. Charpy V notch b. Breaking force.
c. The amount of force required to cause a material to deform plastically.
d. The amount of energy necessary to cause fracture in the presence of a stress concentrator
CLOSED BOOK API 510 ANSWER
Q.No. ANSWER LOCATION OF ANSWER 1 C SEE ASME Q&A IN TEXT
38 C API 510 8.1.5.4.1
39 C API 510 8.1.5.4.4
40 A API 510 5.7(h)
41 D API 510 8.1.6.4.2.2.1
42 C API 510 7.4.4.1 & 7.4.4.2 43 D API 510 8.1.1 & Sec IX
44 D API 510 6.6.1.1
45 C API 510 7.4.5
46 C SEE ASME Q&A IN TEXT
47 D SEVERAL REFERENCES IN ALL CODES
48 B SE-797 1.2
49 C SEE TEXT AND ASME Q&A
50 B SE-797 4.1
51 D ASME Q&A TEXT