API 653 Closed book Flashcards
API 653 defines a “Storage tank engineer” as:
A) A registered professional engineer in structural steel fabrication
B) Person or organization who is knowledgeable and experienced in the engineering disciplines associated with evaluating the integrity and reliability of aboveground storage tanks
C) the engineering department of a contractor who makes repairs to aboveground storage tanks
D) A professional engineer who is also an authorized API 653 inspector
B) Person or organization who is knowledgeable and experienced in the engineering disciplines associated with evaluating the integrity and reliability of aboveground storage tanks
Similar service is means of estimating corrosion rates that:
A) Is Seldom used as a means of scheduling internal inspection intervals
B) Ignores environmental factors in the determination of corrosion rates
C) May be used in addition to or in lieu of actual measurement of corrosion rates
D) Is generally considered as the best methodology for establishing the inspection intervals
C) May be used in addition to or in lieu of actual measurement of corrosion rates
Controlled Deposition welding methods, in lieu of PWHT, is limited to: A) P-1 materials B) P-1 and P-3 Materials only C) P-1, P3, and P4 materials only D) P-5A materials
C) P-1, P3, and P4 materials only
Inspection hold points, for tank reconstruction, shall be designated by:
A) The authorized inspector
B) An engineer experienced in storage tank design
C) Agreement between tank owner/user and reconstruction contractor
D) Agreement between and engineer and the authorized
A) The authorized inspector
All repair and alteration work shall be approved at all designated hold points and after completion:
A) Need not be approved if approved will delay work progress
B) By the repair organization of the repairs were done according to the specified repair and/or alteration procedures
C) By the authorized inspector or experienced storage tank engineer
D) By the authorized inspector only
C) By the authorized inspector or experienced storage tank engineer
Alterations to storage tanks, which comply with API 650, must be authorized by: A) The owner/user B) The storage tank engineer C) The authorized inspector D) The repair organization
B) The storage tank engineer
A record of non-essential variables used during welding of the test coupon is: A) Optional on the PQR B) Optional on the WPS C) Required on the PQR D) Required on the WPQ
A) Optional on the PQR
Cracks is the shell to bottom weld:
A) Shall be evaluated per the “As built” Standard
B) Shall be removed
C) Shall be evaluated on a case by case basis
D) Shall be evaluated per API 579
B) Shall be removed
What welding process is most widely used in the repair of process equipment? A) GMAW B) GTAW C) SMAW D) FCAW
C) SMAW
The owner has decided to install a new bottom in an AST. The new bottom will be installed through existing tombstone reinforcing plates. One Method is to remove the lower portion of the reinforcing plate. After the new or replaced section is installed, the splice weld shall: A) Visually examined only B) Magnetic particle examined only C) Liquid penetrate examined only D) Ultrasonic shear wave examined only
B) Magnetic particle examined only
Which of the following is an advantage of thick film reinforced tank bottom lining?
A) easier to apply than thin film
B) initial cost is typically less than thin film
C) Provides greater resistance to moisture ingress permeation
D) Generally more accurate MFL floor scans
C) Provides greater resistance to moisture ingress permeation
The purpose of reviewing the welder performance qualification (WPQ) is to:
A) Verify that welder are qualified to perform the welding given its position and process
B) Verify that welds made in compliance with the WPS meet requirements
C) Verify that the welding procedure specification can produce quality welds
D) Verify that welders are qualified to perform the welding, including all essential and nonessential variables
A
A) Verify that welder are qualified to perform the
The recommended type of internal floating roof is the: A) Double Deck B) Annular pontoon C) Pan type D) Single steel deck
B
B) Annular pontoon
API Publication 2201 on hot tapping and in-service welding covers: A) Welding requirements B) technical aspects C) Inspection requirements D) Safety aspects
D
D) Safety aspects
A repair is completed on a nozzle that was originally post weld heat treated(PWHT). It has been determined that PWHT, of the repair, is inadvisable. Who is required to conduct a metallurgical review prior to applying one of the alternative methods permitted in API 653?
A) A professional engineer registered in one or more states or provinces of Canada
B) A Storage tank engineer
C) The Authorized inspector responsible for the repair inspection
D) A Metallurgical engineer experienced in alternative PWHT
B
B) A Storage tank engineer
What is another term used for "Stray currents"? A) Short circuits B) Positive currents C) Impressed Currents D) Interface currents
D
D) Interface currents
How and to what extent are new welds for tank bottom plates required to be examined?
A) Newly welded bottom joints shall be tested their entire length using liquid penetrate
B) Newly welded bottom joints shall be tested their entire length using a vacuum box and a solution film, or a tracer gas and detector
C) Newly welded bottom joints shall be tested their entire length using visual examination
D)Newly welded bottom joints shall be tested their entire length using wet fluorescent magnetic particle examination
B
B) Newly welded bottom joints shall be tested their entire length using a vacuum box and a solution film, or a tracer gas and detector
Thick-film linings are commonly reinforced with which of the following?
A) Sand and small diameter gravel
B) Copper wire, Stainless steel wire, and low alloy steel mesh fabric
C)Chopped PVC piping, copped ABS Piping and resin beads
D) Woven glass mat, chopped glass fibers, and organic fibers
D
D) Woven glass mat, chopped glass fibers, and organic fibers
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
B
B) Base metal temperature below 0 F
IF an AST is fabricated of material of unknown toughness and meets the thickness and temperature exemption curve of API 653, the storage tank engineer must concur, in writing, with the alternative weld method in lieu of PWHT. Who is required to authorize the alternative and how must this be accomplished? A) The owner/operator in writing B) The Owner/operator verbally C) The Authorized Inspecor in writing D) The Authorized Inspector verbally
A
A) The owner/operator in writing
When must an evaluation, to determine the suitability for continued use, be conducted?
A) Evaluations shall be conducted when a tank inspection reveals a change has occurred from the original physical condition of a tank.
B) Evaluations shall be conducted at least annually
C) Evaluations shall be conducted at an interval not to exceed the calculated tank inspection frequency
D) Evaluations shall be conducted once each ten years of service
A
A) Evaluations shall be conducted when a tank inspection reveals a change has occurred from the original physical condition of a tank.
Inspection Hold points and minimum documentation to be submitted upon job completion for repairs and alterations will be designated by the: A) Owner/User's engineering department B) Repair organization C) authorized inspector D) Storage tank inspector
C
C) authorized inspector
In a SMAW electrode, the "1" refers to: A) Electrode type B) Coating characteristics C) Chemical composition D) Welding position
D
D) Welding position
NDE is defined as those inspection methods which allow materials to be examined:
A) without damaging the component
B) As an adjunct to visual examination
C) without changing or destroying their usefulness
D) Without using any mechanical force
C
C) without changing or destroying their usefulness
If the date of the installation of a component is unknown, which standard shall be considered as the "as-built" standard? A)1958 edition of API 12C B) the latest edition of API 650 C) The current applicable standard D) The latest edition of UL Standard
C
C) The current applicable standard
The deterioration of metals exposed to soils is referred to as: A) Moisture corrosion B) soil resistivity C) Soil Corrosion D) Galvanic corrosion
C
C) Soil Corrosion
The preheating method alternative to PWHT is limited to:
A) P-1 materials that are required to be impact tested
B) P-1 materials that are not required to be impact testes
C) P-1 or P-3 materials that are required to be impact tested
D) P-1 or P-3 materials that are not required to be impact tested
B
B) P-1 materials that are not required to be impact testes
API 653 defines a “repair organization” as:
A) an owner/operator of aboveground storage tanks who makes repairs or alterations to tanks owned by others.
B) Anyone who makes repairs or alterations to aboveground storage tanks that is authorized by the appropriate jurisdiction to make repairs in accordance with ASME Section VIII
C) Any contractor who repairs or alters aboveground storage tanks.
D) An owner/operator of aboveground storage tanks who repairs or alters his/her own equipment in accordance with API 653
D
D) An owner/operator of aboveground storage tanks who repairs or alters his/her own equipment in accordance with API 653
Which of the following dimensions would be acceptable for lap-welded patch plate repair according to API 653? A) Four inches by five inches B) Eight inches by two inches C) Two inches by two inches D) Six inches by three inches
A
A) Four inches by five inches
When a welders test coupon fails by radiography, how is the welder re-tested?
A) The immediate re-test shall be by visual examination
B) The immediate re-test shall be by radiography
C) The immediate re-test shall be by mechanical testing
D) The immediate re-test shall be by both mechanical testing and radiography
B
B) The immediate re-test shall be by radiography
The owner/operator requires and NPS 3-1/2 nozzle to be installed in an in-service tank. The tank is 110 feet in diameter, 60 feet maximum fill height, shell thickness at the point of hot tap is 0.75", and the material is of unknown toughness with a minimum design metal temperature of 38 F. This nozzle is to be installed adjacent to an existing nozzle. Using the formula Spacing = √(RT) what is the minimum spacing between these nozzles? A) 22.24" B) 9.08" C) 19.08" D) 2.24"
A
A) 22.24”
What is the maximum surface temperature, of the part being examined, permitted for Magnetic Particle examination using dry particles?
A) As determined by the particles manufacturer
B) 600°F
C) 125°F
D) 135°F
A
A) As determined by the particles manufacturer
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
C
C) They shall become the property of the purchaser
If it is decided to change the service to a more severe service, it is necessary to:
A) Consider the need for pneumatically testing the entire tank
B) Consider the need to recalculate the effectiveness of all reinforcement of openings
C) Consider the need for hydrostatic testing
D) Consider removing all previous welded repairs and have them redone
C
C) Consider the need for hydrostatic testing
The original thickness of the first course of an AST was 0.875”. Current thickness measurements show a thickness of 0.631”. The tank has been in service 14 years. What is the corrosion rate of this section of the tank?
A) 0.017” inches per year
B) 0.002 inches per year
C) 0.170” inches per year
D) Corrosion rate cannot be calculated with the available date
A
A) 0.017” inches per year
A defect typically designates:
A) Minimum acceptability
B) An indication that is detectable but acceptable
C) An indication that is rejectable
D) Indication that requires further investigation
C
C) An indication that is rejectable
How does a welder maintain his or her qualification in a particular process?
A) The welder must use the process in Code construction at least once every 12 months
B) The welder must use the process in Code construction at least once every 6 months
C) The welder must use the process at least once every 12 months
D) The welder must use the process at least once every 6 months
D
D) The welder must use the process at least once every 6 months
Why is it recommended that inspectors not walk on insulated roofs?
A) The inspector may damage the insulation
B) The Insulation may contain hazardous substances
C) The Roof Plates may not be strong enough to support the inspector’s weight
D) The inspector may cause indention in the insulation where water can collect
C
C) The Roof Plates may not be strong enough to support the inspector’s weight
If the owner/operator elects to utilize a fitness-for-service evaluation to exempt a repair from hydrostatic testing, who must perform the evaluation?
A) Fitness-for-service evaluations may not be used to exempt hydrostatic testing following a repair
B) The authorized Inspector
C) Engineer experienced in storage tank design and the evaluation methods used
D) Exemption of hydrostatic testing for repairs can only be given by the jurisdiction
C
C) Engineer experienced in storage tank design and the evaluation methods used
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
D
D) They shall not remain
New reinforcing plates shall be installed in accordance with Fig 9-3 of API 653. However, in order to maintain weld spacing, what reinforcing plate is permitted? A) Oval B) Diamond C) Tombstone D) Circular is the only permitted shape
C
C) Tombstone
The thickness of the bottom plate projection beyond the shell, measured at the toe of the weld of the outside bottom-to-shell fillet weld shall be not less than? A) 0.250" B) 0.100" C) 0.500" D) 0.010"
B
B) 0.100”
According to API RP 575, What ultrasonic method can be used to assit in the discrimination between inclusions in the metal and laminations? A) A Scan B) B Scan C) Straight beam D) Shear wave
D
D) Shear wave
The addition of carbon to a metal:
A) Generally makes the material easier to weld
B) Generally makes the material more difficult to weld
C) Has no effect on the weldability of the material
D) Reduces the susceptibility of the material to delayed cracking from hydrogen
B
B) Generally makes the material more difficult to weld
Ultimate responsibility for compliance with API Standard 653 rest with _____?
A) The owner/operator
B) the owner/operators’ inspector
C) The repair organization of the Owner/operator
D) the manufacturing of the AST
A
A) The owner/operator
Of the following what has historically not been a cause of bottom failures?
A) Non-homogeneous fill under the tank bottom
B) Rock or gravel foundation pads with inadequately filled-in surface voids
C) Inadequate inspection frequency
D) Inadequately supported sumps
C
C) Inadequate inspection frequency
No known tank failures attributed to brittle fracture have occurred at shell metal temperature of \_\_\_°F and above A) 60 B) 40 C) 20 D) -20
A
A) 60
Internal inspections are primarily required to do all but which of the following?
A) ensure the internal surfaces of the tank are thoroughly cleaned periodically
B) Identify and evaluate any tank bottom settlement
C) Ensure that the bottom is not severely corroded and leaking
D) gather data necessary for the minimum bottom and shell thickness assessments
A
A) ensure the internal surfaces of the tank are thoroughly cleaned periodically
External ultrasonic thickness measurements of the shell, while the tank is in service, can be a means of determining rate of uniform corrosion. The extent of UT measurements shall be determined by the owner/operator. What is maximum interval of such thickness measurement when the corrosion rate is not known?
A) Five years
B) Three Years
C) One Years
D) Every three months until the corrosion rate is established
A
A) Five years
What is the maximum size of fillet weld permitted, in API 650, in the attachment between the lowest course shell plate and the bottom plate? A) 3/8" B) 1/2" C) 5/16" D) 1/4"
B
B) 1/2”
Which type of corrosion results in relatively uniform metal loss? A) Erosion and erosion/corrosion B) Stray current C) General D) Pitting
C
C) General
When is it necessary to install a new bottom plate over an existing bottom plate, a suitable \_\_\_\_\_\_ material cushion such as sand, gravel or concrete shall be used between the old bottom and the new bottom. A) drainage B) compacted C) Non-conductive D) Non-corrosive
D
D) Non-corrosive
How many settlement survey points are required for an AST that is 180 feet in diameter? N=D/10 A) 12 B) 19 C) 18 D) 10
C
C) 18
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 flanges-to-Nozzle-neck welds
D) Roof Plate welds and bottom plate welds
C
C) Roof plate welds and flanges-to-Nozzle-neck welds
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
B
B) Before hydrostatic testing
Under what condition may magnetic particle examination be performed on a part with a coating such as paint left on the part?
A) It must be demonstrated, in accordance with Mandatory Appendix II, that indications can be detected through the maximum coating thickness applied
B) It must be demonstrated, in accordance with ASME Section VIII, Div 2, that indications can be detected through the maximum coating thickness applied
C) It must be demonstrated, in accordance with Mandatory Appendix I, that indications can be detected through the maximum coating thickness applied
D) All coatings shall be removed prior to magnetic particle examination, the coatings could mask discontinuities
C
C) It must be demonstrated, in accordance with Mandatory Appendix I, that indications can be detected through the maximum coating thickness applied
A properly selected, applied, and maintained internal bottom lining proves leak prevention by____.
A) Limiting internal corrosion of the steel tank bottom
B) Creating a cathodic protection barrier on the internal surface
C) Enhancing the effectiveness of the external cathodic protection system
D) Limiting internal corrosion of the support columns and landings pads
A
A) Limiting internal corrosion of the steel tank bottom
Each welder and welding operator shall be assigned____.
A) only one joint to ensure traceability
B) An identifying number, letter, or symbol
C) A specific welding machine
D) Weld joints on only side of the tank
B
B) An identifying number, letter, or symbol
Soil corrosion appears as external thinning with localized losses due to: A) Grooving B) Acid Etching C) Erosion D) Pitting
D
D) Pitting
The use of oiled sand beneath tank bottoms does not eliminate the need for cathodic protection and in fact may cause cathodic to be less effective because:
A) the oiled sand has higher resistivity
B) The sand is unable to conduct electrical current
C) The oil acts as an insulator and block current flow
D) The oil creates a vapor bearer entrapping water and contaminants next to the tank bottom.
A
A) the oiled sand has higher resistivity
Welder qualification tests conducted by one manufacturer:
A) Qualifies a welder or welding operator to do work for another manufacturer
B) qualifies a welder or welding operator to do work for another manufacturer provided both manufacturer are working in the dame tank farm
C) Shall not qualify a welder or welding operator to do work for another manufacturer
D)Shall not qualify a welder or welding operator to do work for another manufacturer unless the welding procedures are identical
C
C) Shall not qualify a welder or welding operator to do work for another manufacturer
External measurements for tank settlement shall be taken at pints having a maximum spacing of \_\_\_\_\_ around the circumference A) 24 feet B) 28 feet C) 32 feet D) 36 feet
B
B) 28 feet
If more extensive repairs are required within the “Critical Zone” than those listed in API 653, what must be done with the bottom plate?
A) As long as the repairs do not involve the bottom plate, nothing needs to be done
B) the bottom plate welded to the shell shall be cut out and a new plate installed
C) The bottom plate shall be subjected to suitable nondestructive examination to ensure it has not be adversely affected by the repair
D) The bottom plate and the bottom shell course shall be replaced as an assembly
B
B) the bottom plate welded to the shell shall be cut out and a new plate installed
The addition or replacement of shell penetrations shall be in accordance with A) The As-built standard B) API 650 C) API 650 and API 510 D) API 650 and ASME Section VIII, Div 2
B
B) API 650
As a minimum, what safety rules and regulations should be reviewed? A) OSHA B) MIOSH C) Site D) Local jurisdiction
C
C) Site
Atmospheric corrosion can occur on all external parts of a tank. During your inspection, you notice considerable damage to the protective coating and accelerated corrosion rates. What would you suspect the cause to be?
A) Sulfurous, acidic, marine atmosphere
B) Hydrogen and oxygen rich atmosphere
C) Nitrogen and Oxygen rich atmosphere
D) Carbon dioxide and nitrogen rich atmosphere
A
A) Sulfurous, acidic, marine atmosphere
Why is inspection for crack-like flaws of the lower shell-to-sketch-plate weld critical?
A) This area is more susceptible to cracking because it is subjected to internal and external atmosphere
B) This area is critical because in relatively large or hot tanks, it has more potential for cracking
C) This area is critical because in relatively large or hot tanks, it has more potential for corrosion
D) this area is critical because in relatively small or cold tanks, it has more potential for cracking.
B
B) This area is critical because in relatively large or hot tanks, it has more potential for cracking
Lapped patch shell repairs are not permitted on shell courses exceeding what thickness? A) 1/2 inch B) 3/4 inch C) 1 inch D) 1-1/4 inch
A
A) 1/2 inch
Unless an entire shell plate is replaced, the replacement plate may be circular, oblong, square or rectangular provide the corners are:
A) provided with a radius of at least 1 inch
B) Provided with a radius of at least 3% of the short dimension of the plate
C) Provided with a radius of at least 3 inches
D) Provided with rounded corners
D
D) Provided with rounded corners
The preferred methods of detecting Chloride Stress Corrosion Cracking are:
A) Liquid Penetrant and Phase analysis Eddy Current
B) Liquid Penetrant and Ultrasonic Shear Wave
C) Liquid Penetrant and Radiography
D) Liquid Penetrant and Visual
A
A) Liquid Penetrant and Phase analysis Eddy Current
According to API 653, which of the following would not be considered a major repair?
A) Installing a bottom penetration within 12” of the shell
B) Installing shell penetration larger that NPS 12 beneath the design liquid level
C) Removing and replacing or adding a shell plate beneath the design liquid level where the longest dimension of the replacement plate exceeds 12”
D) Removing and replacing the entire roof of a cone roof tank
D
D) Removing and replacing the entire roof of a cone roof tank
Based on the following information, what is the calculated critical length L? Tank diameter 175ft. least thickness in the area of corrosion, exclusive of pits, 0.761" L=3.7√(Dt2) A) 42.7" B) 40" C) 11.54" D) 492.7"
A
A) 42.7”
Replacement and new penetrations, in reconstructed tanks, shall be designated, detailed, welded, and examined to meet what requirements?
A) The current applicable standard
B) The original standard construction
C) The requirements of the Authorized Inspector
D) The requirements of the owner/operator
A
A) The current applicable standard
All shell plates and bottom plates welded tot he shell shall be identified. Material identified by any of the following except _____ does not require further identification?
A) Original contract drawings
B) API Nameplates
C) Suitable documentation
D) Owner/operator’s experience with similar tanks in similar service constructed of similar material
D
D) Owner/operator’s experience with similar tanks in similar service constructed of similar material
How can the life of an impressed current anode be increased?
A) By installing a timing device that activates the current at thirty-second intervals
B) Properly installing the back fill material
C) Use a substitute anode material
D) Using AC Current instead of DC current
B
B) Properly installing the back fill material
What would be the maximum internal pressure permitted on a tank built with 3/16" thick roof plates" Steel plates 1/16" thick typically weight 2.255 pounds per square foot. A) 7.65 psi B) 0.0765 psi C) 0.0531 psi D) 5.31 psi
C
C) 0.0531 psi
Where should the recommended inspection, of the overhead parts and supports, be conducted from?
A) A bosun’s chair suspended through the roof vent after the tank has been gas freed
B) the entry point or other observations points before entering the tank
C) From the very center of the tank bottom with a powerful sealed beam portable light
D) From ladders or scaffolding
B
B) the entry point or other observations points before entering the tank
A multiple position qualification with the axis of the pipe 45° to the horizontal; welding shall be done without rotating the pipe. This is a description of which welder qualification position? A) 1G B) 2G C) 5G D) 6G
D
D) 6G
If existing plates are to be used to reconstruct the tank, they shall be checked for which of the following?
A) Chemical compatibility with other plates used in the reconstruction
B) excessive corrosion and pitting
C) Mechanical strength including impact properties
D) Inadequately reinforced openings
B
B) excessive corrosion and pitting
Inspection reports, as a minimum, shall include which of the following?
A) Type of inspection, scope of inspection, repairs, conditions found, settlement measurements, and recommendations
B) Type of inspection, repairs, operational upsets, settlement measurements, and recommendations
C) Type of inspection, repairs, conditions found, name of organization performing environmental impact study, and recommendations
D) Type of inspection, list of all personnel who have worked on the tank since the last inspection, conditions found, settlement measurements and recommendations
A
A) Type of inspection, scope of inspection, repairs, conditions found, settlement measurements, and recommendations
Of the following, which is not a consideration that must be addressed in determining inspection intervals for AST’s?
A) Corrosion prevention systems
B) Inspection Interval of other equipment located near the tank under consideration
C) Changes in service(Including changes in water bottoms)
D) Previous inspection results
B
B) Inspection Interval of other equipment located near the tank under consideration
What two methods may be used in quantifying the remaining thickness of tank bottoms?
A) Drilling and actual measurements
B) Ultrasonic and radiography
C) minimum remaining thickness calculation and probabilistic
D) Detailed stress analysis and plate deformation measurements
C
C) minimum remaining thickness calculation and probabilistic
The completed welding procedure specification shall describe all but which of the following?
A) Essential Variables
B) Welder’s Essential Variables
C) Supplemental Essential Variable, when required
D) Non-essential Variables
B
B) Welder’s Essential Variables
According to ASME Section IX, When may an IQI be placed on the film side of the part?
A) Never
B) Where inaccessibility prevents hand placing the IQI on the source side
C) Anytime
D) Only with the concurrence of the purchaser
B
B) Where inaccessibility prevents hand placing the IQI on the source side
What are the two systems of cathodic protection? A) Galvanic and repressed current B) Galvanic and impressed current C) Galvanic and reversed current D) Galvanic and induced current
B
B) Galvanic and impressed current
Packaged galvanic anodes should be back-filled with ____.
A) Compacted special backfill material such as coke breeze
B) Compacted sand
C) Compacted limestone or clam shell backfill material
D) Compacted native soil
D
D) Compacted native soil
What should be done if an indication of leakage through a crack is discovered on an in-service tank?
A) A soft patch should be app;lied over the crack and the area observed for 24 hours
B) It may be possible to caulk the crack to stop the leakage
C) The tank shall immediately be removed from service, drained, opened, and repaired
D) The tank should be removed from service as soon as possible and a complete inspection with subsequent repairs made
D
D) The tank should be removed from service as soon as possible and a complete inspection with subsequent repairs made
Alternating Current Field Measurements (ACFM) examination is ideal for inspecting: A) Symmetrical objects B) Complex geometries C) Flat plate D) Item at temperature below freezing
B
B) Complex geometries
Liquid penetrate examination is capable of detecting all but which of the following? A) Cracks B) Laps C) Lamination D) Slight sub-surfaces discontinuities
D
D) Slight sub-surfaces discontinuities
What is the primary reason for PWHT?
A) Improve the appearance of the finished weldment
B) Relieve the residual stresses in the welded fabrication
C) Regain the notch toughness properties of the base metal
D) To realign the parts of the weldment not heated during welding
B
B) Relieve the residual stresses in the welded fabrication
The \_\_\_\_\_\_ shall state the design metal temperature, the design specific gravity, the corrosion allowance, and the design wind velocity A) The purchaser B) The fabricator C) The Inspector D) Erector
A
A) The purchaser
What is the standard temperature range of the liquid penetrate and the part to be processed?
A) Not less than 60°F. No more than 125°F throughout the examination period.
B) Not less that 40°F. No more than 600°F throughout the examination period
C) Not less than 40°F. No more than 125°F throughout the examination period
D Not less than 60°F. No more than 600°F throughout the examination period.
C
C) Not less than 40°F. No more than 125°F throughout the examination period
For reconstructed tank, radiographic examination is required for what % of all junctions of new welds over existing seams? A) 100% B) 75% C) 50% D) 25%
D
D) 25%
API 653 covers which of the following activities? A) Tank design B) Tank fabrication C) Tank operation D) Tank reconstruction
D
D) Tank reconstruction
Corroded roof plates on a fixed-roof tank shall not be less than:
A) Designers recommendation
B) 0.090” thick averaged over and 100 in²
C) 0.050” at any point
D) t-min averaged over critical length “L” dimension
B
B) 0.090” thick averaged over and 100 in²
A new nameplate shall be added to a tank after:
A) either major repairs or major alterations
B) either major alterations or tank reconstruction
C) it has been relocated
D) It has been reconstructed
D
D) It has been reconstructed
For a reconstructed tank, the shell thickness readings used to determine the allowable liquid height must have been taken within the last: A) 30 days B) 60 days C) 90 days D) 180 days
D
D) 180 days
Pitting is found on a shell. Corrective action must take place when the:
A) pits are deeper than 50% of t-min
B) remaining thickness is less than 50% t-min
C) pits are deeper than 60% of t-min
D) remaining thickness is less than 60% t-min
B
B) remaining thickness is less than 50% t-min
Which of the following is part of the critical zone?
A) the bottom within 3” of any roof support column
B) The bottom within 3” of the shell
C) the bottom 3” of the lowest shell course
D) the frangible roof-to-shell course
B
B) The bottom within 3” of the shell
A tank is 20 years old and has a bottom thickness of 0.170". Original bottom thickness was 0.250". Determine the interval for the next internal inspection. A) 10 years B) 15 years C) 17.5 years D) 20 years
C
C) 17.5 years
Widely scattered pits in a tank shell can be ignored if the extent of the pitting does not exceed: A) 2 pits in any 8 inches B) 1 inch in any 8 inches C) 2 inches in any 8 inches D) 2 inch in any vertical 8 inches E) 2 inches in any vertical 8 inches.
E
E) 2 inches in any vertical 8 inches.
Which of the following is an advantage of the sacrificial anode type of cathodic protection?
A) Annual maintenance costs are generally low
B) A single anode covers large surface areas
C) The effective life of the anodes is usually 50 years
D) It is easy to test the system’s effectiveness
A
A) Annual maintenance costs are generally low
Hot taps are permitted:
A) anywhere on the tank
B) Anywhere on the tank provided the tank is gas free
C) only in the liquid section of tank
D) only in the liquid section of tank provided the product flash point is above 350°F
C
C) only in the liquid section of tank
An API 653 hydrotest shall be held for at least: A) 4 hours B) 8 hours C) 12 hours D) 24 hours
D
D) 24 hours
During a tank repair, if API 653 conflicts with the design standard, which standard governs?
A) Most stringent standard
B) Design Standard
C) API 653
D) Either standard based on the inspector’s judgment
C
C) API 653
Which of the following activities is considered an alteration in API 653? A) The addition of a shell lap patch B) The addition of a floor lap patch C) The addition of a shell insert patch D) the addition of 16 NPS nozzle E) the addition of a tank bottom lining
D
D) the addition of 16 NPS nozzle
Repaired or replaced bottom welds shall examined with either a vacuum box or by using: A) a tracer gas test B) radiographic and visual methods C) either MT or PT methods D) a light diesel oil test
A
A) a tracer gas test
Welding procedures for tank repairs to the shell should be qualified on accordance with: A) API 650 B) Original construction standard C) ASME Section IX D) AWS D1.1
C
C) ASME Section IX
A lap patch is installed on a tank bottom and the patch plate crosses a tank bottom weld. What is the minimum dimension for this patch-plate? A) Any size B) 6" C) 10" D)12"
D
D)12”
API 653 is intended to be used by owner/operator organizations that:
A) employ tank inspectors
B) have access to engineers & inspectors
C) have a quality control manual
D) have both inspection and repair organizations
B
B) have access to engineers & inspectors
Which of the following tests are required when qualifying a weld procedure? A) UT shear wave the complete assembly B) a minimum of 6 bend test C) radiography the completed assembly D) a minimum of 2 tension tests
D
D) a minimum of 2 tension tests
The welding position "4G" is a(n): A) overhead fillet weld B) overhead groove weld C) vertical fillet weld D) vertical groove weld
B
B) overhead groove weld
If an atmospheric tank is air tested, the pressure should not exceed: A) 1 inch of water B) 2 inches of water C) 2.5 PSIG D) 14.7 PSIG
B
B) 2 inches of water
Which type of settlement causes the greatest stress on the shell-to-bottom weld? A) Out of plane B) planar tilt C) uniform D) Rigid body tilt
A
A) Out of plane
Prior to hot tapping, how many thickness readings are required at the proposed nozzle location? A) 1 B) 2 C) 4 D) 8
C
C) 4
Which of the following new welds does not need to be examined by magnetic particle or liquid penetrate methods? A) The reinforcing plate-to-shell welds B) Stress relieved assemblies C) the insert plate-to-shell welds D) the nozzle neck-to-shell welds
C
C) the insert plate-to-shell welds
When reconstructing a tank, how many junctions of existing welds to new welds should be radiographed? A) 10% B) 25% C) 50% D) 100%
B
B) 25%
In a corroded area, “t2”, the least thickness exclusive of pits shall be greater than or equal to:
A) 60% of t-min plus corrosion allowance to next inspection
B) 60% of t-min
C) 0.100” plus corrosion allowance to next inspection
D) 0.100”
A
A) 60% of t-min plus corrosion allowance to next inspection
The grain structure of weld metal is most similar to that found in: A) casting B) forging C) extrusions D) rolled plate
A
A) casting
The maximum interval for the second internal inspection is: A) 1/2 remaining life of bottom B) 1/2 remaining life of shell C) 10 years D) 20 years
D
D) 20 years
The maximum interval for the external inspection is”
A) 1/4 remaining life of shell
B) 1/2 remaining life of shell
C) lesser of 5 years or 1/4 life of shell
D) lesser of 10 years or 1/2 life of shell
C
C) lesser of 5 years or 1/4 life of shell
Corrosion has been found on a tank bottom. The calculated remaining life on a tank bottom is 30 years. What is the maximum interval for this internal inspection? A) 10 years B) 15 years C) 20 years D) Inspector judgement
C
C) 20 years
The tank has a remaining shell life of 16 years. What is the maximum interval for the UT thickness measurements on the Shell? A) 4 years B) 8 years C) 15 years D) 16 years
B
B) 8 years
An in-service tank should never have a shell plate thinner than:
A) 0.050”
B) 0.100”
C) 0.125”
D) what is allowed by ASME Section VIII, Div 2
B
B) 0.100”
A tank with cathodic protection has a second bottom added above the old floor, this tank may:
A) experience accelerated corrosion on the lower floor
B) experience accelerated corrosion on the upper floor
C) experience accelerated corrosion on the product side
D) experience a significant decrease in corrosion on both floors
B
B) experience accelerated corrosion on the upper floor
Non-essential welding variables must be recorded: A) only on the PQR B) only on the WPS C) only on the WPQ D) on both the PQR and WPS
B
B) only on the WPS
Which of the following activities must always have a follow-up hydrotest?
A) installing a patch plate on the tank bottom
B) reconstructing a tank
C) changing to a product with a higher specific gravity
D) lowering of the tank operation temperature
B
B) reconstructing a tank
If a new nameplate is required by API 653, the nameplate shall:
A) be attached adjacent to the existing nameplate
B) replace the existing nameplate
C) have letters not less than 1/8”
D) be 5/32” thick
A
A) be attached adjacent to the existing nameplate
The welder must follow which variables on the WPS?
A) only the non-essential variables
B) only the essential variables
C) Both the essential & non-essential variables
D) None of the variables.
C
C) Both the essential & non-essential variables
The maximum size of shell lap patch is: A) 12" in diameter B) 24" square C) 4' vertical and 6' horizontal D) unlimited
C
C) 4’ vertical and 6’ horizontal
The welding of the Shell-To-Bottom weld in a reconstructed tank should be:
A) completed after welding the rest of the bottom
B) completed before welding the rest of the bottom
C) full penetration weld
D) magnetic particle inspected
B
B) completed before welding the rest of the bottom
The maximum out-of-plumpness for a reconstructed tank shall not exceed: A)1/30 of total tank height B) 1/50 of the total tank height C) 1/100 of the total tank height D) 1/200 of the total tank height
C
C) 1/100 of the total tank height
During a repair or alteration, new shell plate welds greater than 1” thick shall be:
A) examined by radiographic methods
B) examined by radiographic and visual methods
C) examined by radiographic, visual, and either MT or PT
D)examined by radiographic, visual, either MT or PT and vacuum box
C
C) examined by radiographic, visual, and either MT or PT
The tank shell has a remaining life of 12 years. What is the interval for the external inspection? A) 3 years B) 5 years C) 6 years D) 10 years
A
A) 3 years
Patch plates are not permitted in the critical zone for carbon steel tanks that operate above: A) 100°F B) 140°F C) 200°F D) 500°F
C
C) 200°F
When RBI assessments are conducted, the assessments must be repeated every: A) 5 years B) 10 years C) 15 years D) 20 years
B
B) 10 years
Prior to the work, all repairs must be authorized by the: A) inspector B) engineer C) both the inspector and engineer D) either inspector or engineer
D
D) either inspector or engineer
The minimum radius on a shell patch is A) 1" B) 2" C) 4" D) 6"
B
B) 2”
The minimum radius on a shell insert patch: A) 1" B) 2" C) 4" D) 6"
D
D) 6”
API 650 lists materials to be used in the construction of tanks covered by the standard. Is it permissible to use materials other than those listed in the standards?
A) No only materials listed ion API 650 may be used in tank fabrication
B) Yes as long as the manufacturer accepts full liability for a tank failure
C) Yes providing it is certified as meeting all requirements of a material listed in the standard and is approved by the API 653 inspector
D) Yes providing it is certified as meeting all the requirements of a material listed in the standards and is approved by the purchaser
D
D) Yes providing it is certified as meeting all the requirements of a material listed in the standards and is approved by the purchaser
Regardless of tank size, what is the minimum number of settlement point measurements?
A) Four
B) Eight
C) Twelve
D) Based on the formula N=D/10
B
B) Eight
Pontoon type floating roofs shall have sufficient buoyancy to remain afloat on a liquid with a specific gravity of
A) 1.0
B) .87
C) .85
D) .70
D
D) .70
In order to properly protect them, employees using tank lining materials should consult which of the following?
A) Their immediate supervisor
B) The owner/operator specifications
C) Previous inspection reports
D) Material Safety Data Sheets (MSDS)
D
D) Material Safety Data Sheets (MSDS)
Which if the following is not listed as a settlement component?
A) Uniform settlement
B) Rigid body tilting of a tank( planar tilt)
C) Out-of-plane settlement (Differential settlement)
D) Soil undermining (Total tank sinking)
D
D) Soil undermining (Total tank sinking)
According to API 653, what is the minimum diagnostic length of each radiograph?
A) The minimum diagnostic length of each radiograph shall be six inches
B) The minimum diagnostic length of each radiograph shall be three inches
C) Th e minimum length of each radiograph shall be nine inches
D) The minimum diagnostic length of each radiograph shall be twelve inches
A
A) The minimum diagnostic length of each radiograph shall be six inches
What methods of inspection must be considered when establishing inspection frequencies?
A) On-stream core sample inspection
B) On-stream nondestructive inspection
C) In-service aerial inspection
D) In-service groundwater inspection
B) On-stream nondestructive inspection
Changes to a WPS require re-qualification when all but which of the following changes are made?
A) Changes to supplemental Essential Variables (When they are required)
B) Changes to essential variables
C) Changes of a non-essential variable to suit production
D) Any change affecting the ability of the weldment to meet code requirements
C) Changes of a non-essential variable to suit
Mechanical damage to floating roof perimeter seals shall be repaired or replaced. How buckled parts handled?
A) They shall be replaced
B) They may be straightened in place
C) They may be heated and bent back into position
D) They may be removed straightened and re-installed
A) They shall be replaced
If existing plates are to be used to reconstruct the tank, they shall be checked for which of the following?
A) Chemical compatibility with other plates in the reconstruction
B) excessive corrosion and pitting
C) Mechanical strength including impact properties
D) Inadequately reinforced openings
B) excessive corrosion and pitting
Close visual inspections of AST, from the ground, is required. This inspection may be performed by owner/operator personnel who may be other than the Authorized Inspector. The internal of such inspections shall not exceed:
A) At least every five year or 1/4 the corrosion rate life of the shell whichever is less
B) 12 months
C) 6 months
D) 1 month
D) 1 month
In repairing butt-weld flaws, what type and extent of examination is required to comply with API 653?
A) random examination by radiography or ultrasonic methods
B) examined full length by liquid penetrant or magnetic particle methods
C) Examined at three foot intervals by radiography or ultrasonic methods
D) Examined full length by radiography or ultrasonic methods
D
D) Examined full length by radiography or ultrasonic methods
Openings in tank shell, larger than that required to accommodate an NPS ___ flanged or threaded nozzle shall be reinforced.
A) 2
B) 2.5
C) 3
D) 3.5
A
A) 2
What is the main disadvantage in using large size particles in the soil cushion material?
A) the large particles may puncture the tank bottom
B) the large particles may trap moisture and allow general corrosion to form
C) If large particles are used, differential aeration corrosion may result where particles contact the tank bottom
D) The large particles are more difficult to transport
C
C) If large particles are used, differential aeration corrosion may result where particles contact the tank bottom
What are the requirements regarding mill test reports according API 650?
A) No material shall be used in the construction of an SAST unless it is accompanied by a mil test report
B) Mill test report are required only on shell plate material
C) Mill test reports shall be furnished to the purchaser only when specified in the original purchase order
D) Mill test reports shall be furnished to the purchaser prior to final acceptance of the AST
C
C) Mill test reports shall be furnished to the purchaser
A discontinuity is an interruption of the typical structure of a material and:
A) Is considered a defect
B) Is reason for rejection
C) Is not necessarily considered a defect
D) Is usually crack like in appearance
C
C) Is not necessarily considered a defect
API 653 permits the addition of reinforcing plates to existing un-reinforced nozzles. What requirement is necessary to add this reinforcement to the inside of the tank?
A) The reinforcement plate may not be added to the inside of the plate
B) A telltale hole shall be drilled through the shell opposite the reinforcement plate
C) The reinforcement plate is the same material as the nozzle and is attached tot he nozzle
D) Sufficient nozzle projection must exist
D
D) Sufficient nozzle projection must exist
When a lapped patch repair plate is used to reinforce the thickness of a shell, which of the following is correct?
A) the repair plate thickness shall be based on the latest edition of API 650 and 653 using a joint efficiency not exceeding 0.35
B) the repair plate thickness shall be based on the applicable as-built standard and API standard 653 using a joint efficiency not exceeding 0.35
C) The repair plate thickness shall be based on the latest edition of API 650 and 653 using a joint efficiency not exceeding 0.70
D) The repair plate thickness shall be based on the applicable as-built standard and API standard 650 using a joint efficiency not exceeding 0.70
B
B) the repair plate thickness shall be based on the applicable as-built standard and API standard 653 using a joint efficiency not exceeding 0.35
If more extensive repairs are required, within the “Critical Zone”, then those listed in API 653, what must be done with the bottom plate?
A) As long as the repairs do not involve the bottom plate, nothing needs to be done
B) The bottom plate under the bottom shell course shall be cut out and a new plate installed
C) The bottom plate shall be subjected to suitable nondestructive testing to ensure it has not been adversely affected by the repair
D) The bottom plate and the bottom shell course shall be replaced as an assembly
B
B) The bottom plate under the bottom shell course shall be cut out and a new plate installed
During reconstruction, 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 conditioned, 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
C
C) The welder and the work are properly shielded
When installing a pipe nozzle into an in-service tank, hot tapping, how shall the pipe nozzle be prepared?
A) The pipe nozzle must be cut to the other contour of the tank and prepared for full fillet welding
B) The pipe nozzle shall be cut to the contour of the tank and beveled to a depth of not more than 1/3 the nozzle thickness to ensure partial penetration groove welding
C) The pipe nozzle shall be cut the contour of the tank and beveled to a depth of not less than 1/3 the nozzle thickness to ensure partial penetration groove welding
D) The pipe nozzle shall be cut to the contour of the tank and beveled from the outside for a full penetration weld
D
D) The pipe nozzle shall be cut to the contour of the tank and beveled from the outside for a full penetration weld
According to API 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 specifications
D) Test coupons for the WPS shall only be taken from weld filler metal and not from the base metal
B
B) Test coupons for the WPS shall be taken from the actual plate to be used
When it is necessary to install a hot top connection or add a reinforcing plate to an existing un-reinforced penetration, API 653 requires what type, extent, and purpose of examination.
A) Magnetic particle examination for slight sub-surface discontinuities shall be performed in an area equal to twice the diameter of the opening
B) Radiographic examination for cracking shall be performed in the immediate area
C) Ultrasonic examination for cracking shall be performed in the immediate area
D) Ultrasonic examination for lamination shall be performed in the immediate area
D
D) Ultrasonic examination for lamination shall be performed in the immediate area
Generally, tank in petroleum service use ____ on the internal surfaces to control internal corrosion.
A) AC current instead of DC current cathodic protection systems
B) coatings
C) Cathodic protection in conjunction with coatings
D) Since pure hydrocarbon fluids are usually not corrosive experience shows that internal corrosion will never occur therefore, corrosion control is not necessary
B
B) coatings
API 650 requires telltale holes in reinforcing plates. What is the required dimension of this hole and what should be done with it after the initial re-pad pressure test?
A) The hole shall be 3/8” and shall be left open to the atmosphere
B) The hole shall be 1/4” and shall be left open to the atmosphere
C) The hole shall be 3/8” abd shall be closed after testing
D) The hole shall be 1/4” and shall be closed after testing
B
B) The hole shall be 1/4” and shall be left open to the atmosphere
Repair plates for lapped patch repairs may square or rectangular in shape. These plates must be provided with a corner radius of at least:
A) Radius of 1 inch
B) Radius of 2 inches
C) Radius of 3 inches
D) Radius of 4 inches
B
B) Radius of 2 inches
During the installation of a new steel bottom over an existing steel bottom, which has been repaired, of water or other electrolyte intrudes into the interstitial space, what can happen?
A) a galvanic cell may form which will cause the new steel tank bottom to corrode at an accelerated rate
B) An electrochemical reaction may take place creating hazardous gasses
C) a galvanic cell may form which will cause the old tank bottom to corrode at an accelerated rate.
D) A galvanic cell may from which will turn the old tank bottom into an anode
A
A) a galvanic cell may form which will cause the new steel tank bottom to corrode at an accelerated rate
What test is used to determine a materials notch toughness?
A) Impact test
B) Bend test
C) tensile test
D) elongation test
A
A) Impact test
When it is necessary to install a new tank bottom above an existing, it may be necessary to alter existing shell penetrations. This procedure may require the existing reinforcing plate to be removed and a new reinforcement plate is added. This is not permitted when what condition exists?
A) The assembly was originally hardness tested
B) The existing assembly was not impact tested
C) The existing assembly was fabricated from re-claimed material
D) The existing assembly was stress relieved
D
D) The existing assembly was stress relieved
The owner/operator is required to maintain complete record file consisting of three types of records. Which of the following is not one of the three types of records?
A) Repair/alteration history
B) Fill cycles
C) Construction
D) Inspection
B
B) Fill cycles
In ultrasonic thickness, the higher the temperature of the steel being examined, the:
A) reading cannot be obtained
B) higher the reading
C) lower the reading
D) reading will not be affected
B
B) higher the reading
ASME section V states the extent of radiographic examination is specified:
A) The extent of any examination will be dictated by the Authorized Inspector based on his experience
B) The extent of examination shall be as specified by the referencing code
C) the extent of examination will be as specified in SNT-TC-1A
D) As required by the Material Specification
B
B) The extent of examination shall be as specified by the referencing code
Welders making welds using all but which of the following SMAW, GTAW, SAW, and GMAW may be qualified using radiography?
A) SMAW
B) GTAW
C) GTAW
D) GMAW - short circuiting mode
D
D) GMAW - short circuiting mode
According to API 575, where would you expect to find paint blisters?
A) On the roof and on the side of the tank on the north side
B) On the roof and on the side of the tank subjected to mist over-spray from cooling towers
C) On the roof and on the side of the tank adjacent to another tank
D) On the roof and on the side of the tank receiving the most sunlight
D
D) On the roof and on the side of the tank receiving the most sunlight
After the valve has been installed on the flange, a pressure test of at least ___ shall be performed on the nozzle prior to mounting the hot tap machine
A)The same pressure as the pneumatic test of the reinforcing pad
B) 1.25 times the hydrostatic head
C) 1.5 times the hydrostatic head
D) 2.0 times the hydrostatic head
C
C) 1.5 times the hydrostatic head
In conducting a preliminary visual inspection, what is the recommended sequence of the inspection?
A) Bottom, Shell, internal supports, and then roof
B) Shell Bottom, internal supports and then roof
C) The internal supports, roof, shell, and then bottom
D) Roof, internal supports, shell, and then bottom
D
D) Roof, internal supports, shell, and then bottom
Which of the following is a correct statement regarding oxygen concentration of the electrolyte.
A) Oxygen concentration in the electrolyte has no impact on the corrosion cell
B) Areas of lower oxygen concentration become anodic and areas of higher concentrations become cathodic
C) Areas of lower oxygen concentration become cathodic and areas of higher concentrations become anodic
D) Areas of lower oxygen concentration become acidic and areas of higher concentration becomes alkaline
B
B) Areas of lower oxygen concentration become anodic and areas of higher concentrations become cathodic
When a lap patch shell repair is used, what is the minimum thickness permitted for the repair plate?
A) Not less than .250”
B) Not less than .1875”
C) Not less than .500”
D) Not less than .375”
B
B) Not less than .1875”
When a new tank bottom has been installed in a floating roof tank, what consideration must be given to the floating roof level?
A) The floating roof will find its own level
B) The support legs can be jacked up or shortened by the same amount as the thickness of the cushion and new bottom plate
C) The support legs can be jacked up or shortened by the same amount as the thickness of the cushion only
D) the support can be jacked up or shortened by the same amount as the thickness of the new bottom plate only
B
B) The support legs can be jacked up or shortened by the same amount as the thickness of the cushion and new bottom plate
If during your inspection, you find distortion around a nozzle connection, what additional action would you recommend?
A) All seams and the shell in this area should be examined for cracks
B) All horizontal welds around the tank in the course that contains the nozzle should be examined
C) all vertical welds within 36 inches of the nozzle should be examined
D) An area measuring two nozzle diameters square should be examined around the nozzle
A
A) All seams and the shell in this area should be examined for cracks
“That property of a ferrous alloy that determines the depth and distribution of hardness induced by quenching” is a definition of:
A) Hardness
B) Tempering
C) Upper transformation limit
D) Hardening or hardenability
D
D) Hardening or hardenability
During dismantling and reconstruction, 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
D
D) They shall not remain
Special consideration must be given to what area of the tank bottom with regard to thick-film lining?
A) The center because this is the area that will be subjected to the most stress
B) The critical zone
C) Any butt weld joints in the tank bottom
D) The coving at the transition from the tank bottom to the shell
D
D) The coving at the transition from the tank bottom to the shell
All tanks shall be given a visual external inspection, by an authorized inspector, a at what frequency?
A) Inspection conducted at least every 20 years or at the quarter corrosion rate of the bottom whichever is less
B) Inspection conducted at least every 5 years or at the quarter corrosion rate of the bottom whichever is less
C) Inspection conducted at least every 5 years or at the quarter corrosion rate of the shell whichever is less
D) Inspection conducted at least ever 20 years or at the quarter corrosion rate of the shell whichever is less
C
C) Inspection conducted at least every 5 years or at the quarter corrosion rate of the shell whichever is less
According to industry experience and laboratory test, what membrane stress is required to cause failure due to brittle fracture?
A) 6ksi
B) 7ksi
C) 10ksi
D)12ksi
B
B) 7ksi
A minimum service life ___ years should be expected from a properly selected and applied lining system.
A) 20
B) 25
C) 30
D) 50
A
A) 20
API 653 requires the number and location of radiographs to in accordance with API 650. In addition, API 653 requires how many and what location for vertical joints of new shell plates to existing shell plates?
A) One radiograph shall be taken in each fifty foot length
B) one radiograph shall be taken in each twenty-five foot length
C) One radiograph shall be taken in each joints
D) One radiograph shall be taken in every other joint
C
C) One radiograph shall be taken in each joints
Distortion of anchor bolts and excessive cracking of concrete structures may be indications of what two conditions?
A) Serious foundation settlement of a tank overpressure uplift condition
B) Inferior material used in the anchor bolts and the concrete structure
C) Over tightening of the anchor bolts and improper mixing of the concrete
D) The tank was struck by lightning and wind causes movement of the tank
A
A) Serious foundation settlement of a tank overpressure uplift condition
Lapped patch shell repairs are not permitted on shell courses exceeding what thickness?
A) 1/2”
B) 3/4”
C) 1”
D) 1-1/4”
A
A) 1/2”
The minimum dimension for a replacement shell plate shall be __ inches or __ times the thickness of the replacement plate whichever is ___.
A) 12 ,12, greater
B) 12, 12, lesser
C) 18, 18, greater
D) 18, 18 lesser
A
A) 12 ,12, greater
The risk of tank failure due to brittle fracture is considered minimal after what conditions?
A) The tank has demonstrated its ability to withstand the combined effects of maximum liquid level and the highest operating temperature
B) The tank has demonstrated it ability to withstand the combined effects of intermediate liquid level and the lowest operating temperature
C) The tank has demonstrated its ability to withstand the combined effects of maximum liquid level and lowest operating temperature
D) The tank has demonstrated its ability to withstand the combined effects of maximum liquid level and intermediate operating temperature
C
C) The tank has demonstrated its ability to withstand the combined effects of maximum liquid level and lowest operating temperature
After fabrication is completed but prior to filling an above ground storage tank with test water, reinforcing plates shall be tested. What method of test and pressure shall be used?
A) Hydrostatic pressure test at up to 15 psig
B) pneumatic pressure test at up to 15 psig
C) a vacuum test at a partial pressure of 2 psig
D) a pneumatic pressure tst at up to 25 psig
B
B) pneumatic pressure test at up to 15 psig
As a general rule, the temperature of steel surface should be ___ and the humidity should be ___ during the application and curing of the lining.
A) 5°F above the dew point - below 60%
B) 5°F above the dew point - below 80%
C) 5°F below the dew points - above 80%
D) 5°F above the dew point - above 80%
B
B) 5°F above the dew point - below 80%
Internal floating roofs shall be designated to safely support at least
A) 500 pounds over 1 square foot
B) 500 pounds over 1 square inch
C) 500 pounds over 1 square yard
D) 500 pounds over 1 square meter
A
A) 500 pounds over 1 square foot
What is the minimum number of circulation vents that must be located on the shell or fixed roof above the eal of the floating roof when the tank is full?
A) 8
B) 4
C) 6
D) 2
B
B) 4
The radiographic film for all junctions of vertical and horizontal joints in new fabrication 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
B
B) 2 inches
Safe work practices procedures shall be developed according to the guidelines given in which of the following?
A) API 650, API 651 & API 521
B) API standard 2015, API RP-2016, API Pub-2217A
C) ASME Section VII, National Board Inspection Code, Owner/User specification
D) NFPA, Underwriter’s Laboratory, AWS Requirements
B
B) API standard 2015, API RP-2016, API Pub-2217A
To ensure suitability for service, what is the minimum permitted frequency of tank foundation inspection?
A) Annually
B) every five years
C) Monthly
D) Periodically
C
C) Monthly
In placing the anodes, how is better current distribution and more uniform polarization obtained?
A) By distributing anodes uniformly around the tank or under the membrane for new construction
B) By distributing anodes uniformly around the dike area or under the tank for new construction
C) By distributing the cathodes uniformly around the tank or under the tank for new construction
D) By distributing the anodes uniformly around the tank or under the tank for new construction
D
D) By distributing the anodes uniformly around the tank or under the tank for new construction
