API 570 Question Bank (API 570 QB001)

151) On buried piping, what is the frequency of pipe coating holiday surveys?

a) The frequency is governed by the leak test interval of the pipe

b) It is usually based on indications that other forms of corrosion control are ineffective.

c) Surveys are normally made every 5 years

d) Pipe coating holiday surveys are made when the pipe is excavated.

152) For a piping buried in lengths greater than __________ feet and not cathodically protected, evaluation of soil corrosivity should be performed at 5-year intervals.

a) 50

b) 75

c) 100

d) 150

153) If buried piping is cathodically protected, the system should be monitored at intervals in accordance with Section 10 of NACE RP0169 or Section 90 of API RP 651. 

API RP 651 specifies __________ interval.

a) Annual

b) Biannual

c) Biennial

d) Trennial

154) Buried piping inspected periodically by excavation shall be inspected in lengths of __________ feet at one or more locations judged to be most susceptible to corrosion

a) 2 to 4

b) 4 to 6

c) 6 to 8

d) 8 to 10

155) After excavation of buried piping, if inspection reveals damaged coating or corroded piping:

a) The condition should be noted in the records and the inspection interval shortened

b) The complete piping system must be day-lighted (excavated) for repair or replacement.

c) The damaged coating or corroded piping must be repaired or replaced

d) Additional piping shall be excavated until the extent of the condition is identified.

156) If buried piping is contained inside a casing pipe, the casing should be:

a) Capable of carrying the same pressure as the product pipe

b) Checked to see if its protective coating is intact and serviceable

c) Pressure tested to make sure it is serviceable

d) Inspected to determine if water and / or soil has entered the casing

157) An alternative or supplement to inspection of buried piping is leak testing with  liquid at a pressure at least __________ % greater than the maximum operating pressure at intervals ½ the length of those shown in Table 9-1 of API 570 for piping NOT cathodically protected and at the same intervals as shown in Table 9-1 for cathodically protected piping.

a) 5

b) 10

c) 25

d) 50

158) The leak test for buried piping should be for a period of __________ hours.

a) 4

b) 8

c) 12

d) 24

159) The leak test for a 8" diameter buried piping system is 300 psi. After 7 hours, the pressure reacts 273 psi. What should the inspector do?

a) Nothing is required. The loss of pressure is negligible and will not affect the test. The loss can be disregarded.

b) The system should be re-pressurised to the original leak test pressure and the test should begin again.

c) The test charts and the temperature should be reviewed to determine if any change in temperature caused the pressure drop.

d) The piping should be visually inspected externally and / or inspected internally to find the leak and assess the extent of corrosion.

160) A buried piping system that is not cathodically protected has to have an inspection interval set. The soil resistivity is checked and found to be 3400 ohm/cm. As the inspector, what interval would you set?

a) 2.5 years

b) 7.5 years

c) 5 years

d) 10 years

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API 570 Question Bank (API 570 QB001)

124) Which of the following is NOT an item for consideration by an inspector when a leak sealing fluid ("pumping") is used for a temporary leak seal repair:

a) Consider the compatibility of the sealant with the leaking material

b) Consider the pumping pressure on the clamp (especially when re-pumping)

c) Consider the pressure testing of the piping in question

d) Consider the number of times the seal area is re-pumped

125) Any welding conducted on piping components in operation must be done in accordance with 

a) NFPA 704

b) API Standard 510

c) ASME B31.3

d) API Publication 2201

126) All repair and alteration welding to piping systems shall be done in accordance with the:

a) Exact procedures of ASME B31.3 or to the code to which it was built

b) Standards of ASME B31.1 or the code to which it was built

c) Principles of ASME B31.3 or the code to which it was built

d) Ideals of ASME, NBIC, or API standards

127) Welders and welding procedures used in making piping repairs, etc. shall be qualified in accordance with:

a) ASME B31.3 or the code to which the piping was built

b) NBIC or the system to which the piping was built

c) NACE or the method to which the piping was built

d) ASTM or the law to which the piping was built

128) The repair organisation responsible for welding shall maintain records of welding procedures and welder performance qualifications. These records shall be available to the inspector:

a) At the end of the job

b) After the start of welding

c) Following the start of welding

d) Before the start of welding

129) Preheating to not less than  __________ °F may be considered as an alternative to post weld heat treatment for alterations or repairs of P-1, piping initially post weld heat treated as a code  requirement (may not be used if the piping was post weld heat treated due to environmental cracking prevention).

a) 150

b) 200

c) 300

d) 350

130) When u sing local PWHT as a substitute for 360-degree banding on local repairs of PWHT'd piping, which of the following items is NOT considered.

a) The application is reviewed, and a procedure is developed by the piping engineer

b) The locally PWHT'd area of the p ipe must be RT'd or UT'd

c) A preheat of 300°F or higher is maintained while welding

d) The PWHT is performed for code compliance and not for environmental cracking

131) Piping butt joints shall be:

a) Double spiral fillet welds

b) Single fillet lap welds

c) Double fillet lap welds

d) Full-penetration groove welds

132) When should piping components that need repair be replaced?

a) When enough time remains on a turnaround to allow replacement

b) When repair is likely to be inadequate

c) When the cost of repair is as high as renewal

d) When replacement is preferred by maintenance personnel

133) Fillet welded patches (lap patches) shall be designed by

a) An engineer

b) The inspector

c) The piping engineer

d) The repair organisation

134) Fillet welded lap patches (overlay patches) shall leave:

a) No membrane stresses

b) Right-angle corners

c) Rounded corners

d) Burnished corners

135) Materials used in making welding repairs or alterations __________ be of known weldable quality:

a) May

b) Shall

c) Should

d) Can

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API 570 Question Bank (API 570 QB001)

114) What type of repairs and procedures may the inspector give prior general authorisation to continue (provided the inspector is satisfied with the competency of the repair organisaton)?

a) Major repairs and minor procedures

b) Limited or routine repairs and procedures

c) Alterations and re-ratings

d) Minor re-ratings and alterations

115) Who approves all proposed methods of design, execution, materials, welding procedures, examination and testing of in-service piping?

a) The jurisdiction or the piping engineer as appropriate

b) The analyst and the operator as appropriate

c) The examiner and the piping programmer as appropriate

d) The inspector or the piping engineer as appropriate

116) Who must give approval for any on-stream welding?

a) Owner-user

b) Jurisdiction

c) Examiner

d) Analyst

117) An inspector finds a crack in the parent metal of a pipe adjacent to a support lug. The pipe was being inspected after a 5 year run. Before repairing, he should:

a) Notify the jurisdiction prior to the start of any repairs

b) Write a detailed procedure for the repair organisations use in repairing the crack

c) Consult with the piping engineer to identify and correct the cause of the crack.

d) Consult with a metallurgist prior to writing a procedure to repair the crack.

118) A full encirclement welded split sleeve designed by a piping engineer may be applied over a damaged or corroded area of a pipe. This is considered a temporary repair. When should a permanent repair be made?

a) If the owner-user designates the welded split sleeve as permanent, it may remain.

b) A full encirclement welded split sleeve is permanent if okayed by the inspector.

c) A full encirclement welded split sleeve is considered a permanent repair.

d) A permanent repair must be made at the next available maintenance opportunity.

119) What type of defect, corrosion, pitting and / or discontinuity should not be repaired by a full encirclement welded split sleeve?

a) A longitudinal check

b) A circumferential crack

c) Pits that are one half through wall

d) General corrosion in the longitudinal direction.

120) If a repair area is localised (for example, pitting or pin-holes) and the specified minimum yield strength (SMYS) of the pipe is not more than __________ psi, a temporary repair may be made by fillet welding a properly designed plate patch over the pitted area:

a) 30,000 psi

b) 55,000 psi

c) 40,000 psi

d) 36,000 psi

121) Insert patches (flush patches may be used to repair damaged or corroded areas of pipe if several requirements are met. One of these is that an insert patch (flush patch) may be of any shape but it shall have rounded corners with __________ minimum radii.

a) 0.375"

b) 0.50"

c) 0.75"

d) 1"

122) An inspector finds a pin-hole leak in a weld during an on-stream inspection of a  piping system. A permissible temporary repair is :-

a) The use of plastic steel to seal off the leak

b) Driving a wooden plug into the hole

c) Screwing a self tapping screw into the hole

d) The installation of a properly designed and fabricated bolted leak clamp.

123) Temporary leak sealing and leak dissipating devices shall be removed and the pipe restored to original integrity:

a) As soon as the piping system can be safely removed from service

b) At a turnaround or other appropriate time

c) When the leak seal and leak dissipating device ceases to work

d) As soon as possible – must be done on a safe, emergency shut-down basis

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API 570 Question Bank (API 570 QB001)

104) A piping engineer is designing a piping service with high potential consequences if a failure occurs, i.e., a 350 psi natural gas line adjacent to a high density population area. What should he consider doing for unanticipated situations?

a) Have all his calculations checked twice.

b) Increase the required minimum thickness.

c) Notify the owner-user and the jurisdiction.

d) Set up an emergency evacuation procedure.

105) When evaluating locally thinned areas, the surface of the weld includes __________ on either side of the weld or __________ times the minimum measured thickness on either side of the weld, whichever is greater.

a) 0.5”, 3

b) 1”, 2

c) 2”, 1

d) 1.5”, 1.5

106) An inspector finds a thin area in a fabricated 24" diameter pipe. The thin area includes a longitudinal weld in the pipe and is 10 feet long and 2 foot circumferentially. Calculations show that with 0.85 joint factor, the pipe must be repaired, renewed, etc. or the pressure in the pipe must be lowered. The owner does not want to do any hot work on the pipe and he does not wish to lower the pressure. What other course could you follow?

a) Write the results of the inspection up and leave it with the owner.

b) Radiograph the weld 100 % and increase the joint factor to one.

c) Insist that the weld be repaired or renewed or that the pressure be lowered.

d) Call in a regulator agency to force the owner to repair, renew, etc. the line.

107) Piping stress analysis is done during the system's original design. How can the inspector make use of stress analysis information?

a) An inspector cannot use this information. It is only meaningful to a piping engineer.

b) It can be used to make sure the piping system was originally evaluated and designed correctly.

c) It can be used to concentrate inspection efforts at locations most prone to fatigue or creep damage, and to solve vibration problems.

d) The inspector should use this information to evaluate the need for conducting additional piping stress analysis.

108) You are inspecting a piping system. You find a significant loss of material (a major increase of corrosion rate) in gas oil piping (used as reboiler oil, temperature 

 500°F) on a Fluid Catalytic Cracking Unit. What is the best course of action for you to take?

a) The losses may be reported to your supervisor for corrective response

b) The losses should be recorded and reported in your final report after the unit has started.

c) It shall be reported to the owner-user for appropriate action.

d) Replace excessively thin piping and note replacement in the final report after unit start-up.

109) The __________ shall maintain appropriate permanent and progressive records of each piping system covered by API 570.

a) Inspector

b) Owner-user

c) Jurisdiction

d) Examiner

110) When making repairs and alterations to piping systems, the principles of __________ or the code to which the piping system was built shall be followed:

a) ASME B31.3

b) API 570

c) API 574

d) ASME B&PV Code

111) Repair and alteration work must be done by a repair organisation as defined in API 570 and must be authorised by the __________ prior to its commencement:

a) Jurisdiction

b) Inspector

c) Owner-user

d) Examiner

112) Authorisation for alteration work to a piping system may be given by the inspector after:

a) Notifying the jurisdiction and getting their approval

b) Consulting API 570 and getting the approval of the owner-user

c) Consultation with and approval by a piping engineer

d) Discussing with and consent by an examiner

113) A repair procedure involving welding requires that the root pass of the weld be inspected before continuing the weld. A "hold" on the repair is required at this point. Who designates this "hold?"

a) A metallurgist

b) The owner-user

c) An API 570 inspector

d) The welder supervisor 

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API 510 Question Bank (API 510 QB002)

Hie! folks,

This is the second question bank for API 510 Pressure Vessel Inspector Exam. For your information this second question bank questions are open book questions, you can refer code books during exam to answer. 

1. A standard  seamless , ASME F & D head (Torispherical) is used for the following conditions:

Material of Construction = SA 515 gr 60

Design Pressure = 250 psig 

Design temp = 580ºF

Inside Crown Radius = 72 inches 

Minimum available thk. = 1.14 inches 

Category B welds are spot radiographed.

Corrosion allowance = 0.125 inches 

Allowable stress at design temp.   = 16400 psig

Your assessment is:

a. The head does not meet code requirements.

b. The head meets the code requirements.

c. Suitability would depend on decision of pressure vessel inspector.

d. Data are not adequate.

2. A pressure vessel is to be constructed with MDMT = +20°F, M.O.C = SA 515 gr 60 . Impact testing not performed.

Required shell thickness = ¾ , dished head thk. =  1-⅛ " ( torisph. head). Determine if this material is suitable for:

a. Both shell as well as dished head

b. Suitable for head but not for shell

c. Suitable for shell only but not for head

d. Not suitable for either

3. For a certain pressure vessel with spot radiography, and all Welds  type 1, 

Vessel diameter =  72 inch I.D.  

M.O. C = SA 515 gr 70 

Design temp. = 600°F 

Allowable stress at design temp. = 20,000 psi  

If shell thk. = 5/8" and C. A = 1/8", the MAWP for the shell will be:

a. 234 psi

b. 168 psi

c. 256 psi 

d. None of the above

4. A pressure vessel (M.O.C. 516 gr. 70) has external jacket spread over 72 inches length of the shell. (Jacket pressure = 180 psi, Jacket temperature = 350°F) the vessel OD = 36 inches. Shell thickness= 0.5 inch, C.A. = Nil.  Decide which of the following are applicable in the present case.

a. Shell thickness is OK.

b. Shell thickness is NOT OK.

c. Data are not adequate.

d. Acceptance of shell thickness depends on opinion of vessel engineer.

5. Choose correct hydrostatic test pressure from given options for a vessel   with the following data:

Design Pr = 360 psi

Design temp = 675ºF

M.O.C = SA 537 Cl. 1

Allow stress (Ambient) = 18600 psi

Allow stress (675°F) = 16900 psi

a. 540 psig 

b. 515 psig

c. 450 psig

d. None of above

6. Impact test requirement for the two plates is to be assessed for MDMT = 0ºF, to be used for Vessel which will be hydrotested and used for steady operation. 

Plate A. Plates 537 class 1,    2.0 inch thick 

Plate B. Plates 515 gr 60,      0.75 inch thick 

Your assessment is:

a. Plate (A) and plate (B) both require impact test.

b. Only (A) requires, (B) is exempt.

c. Only (B) requires, (A) is exempt.

d. Both do not require impact testing.

7. For vessel shell, thk= 4.0 inch, max. weld mismatch shall be as follows:

a. Long seam = ¼”, circ seam = ½”

b. Long seam = ¼”, circ seam = 7/32”

c. Long seam = 7/32”, circ seam = ¼”

d. Long seam = 5/8”, circ seam = ½”

8. Toughness (opposite of brittleness) will be best for which materials:

a. Materials represented by curve A

b. Materials represented by curve B

c. Materials represented by curve C

d. Materials represented by curve D

9. In a pressure vessel one of the 2:1 ellipsoidal dished head is removed and a new seamless dished head of same type is installed with a single ‘V’ joint with backing strip and full radiography. What is the joint category, type and efficiency of the joint now?

a. Category-B,  Type-1 &  E-0.9

b. Category-B,  Type-2 &  E-0.9

c. Category-A,  Type-2 &  E-1.0

d. Category-B,  Type-2 &  E-1.0

10. A pressure vessel of overall height 80’ has its part MAWP at various parts as detailed in the sketch. What is the vessel MAWP (hydrostatic head 1’ = 0.433 psi)?

a. 419 psi

b. 420 psi

c. 430 psi

d. 426 psi 

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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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