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API 653 Closed book quiz latest 2024
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API 653 covers which of the following types of tanks?
A) Carbon and low alloy steel tanks built to ASME Section VIII, Div. 1
B) Carbon and low alloy steel tanks built to ASME Section X
C) Carbon and low alloy steel tanks built to API 650 and 12C
D) Carbon and low alloy steel tanks built to API 510 ✔✔C
API 653 provides the requirements for construction of which of the following?
A) Process pressure vessels
B) Aboveground petroleum storage tanks
C) LNG Storage spheres
D) This standard does not provide construction requirements ✔✔D
API 653 provides for all but which of the following is not with regard to aboveground storage tanks?
A) Repair
B) Operation
C) Relocation
D) Alteration ✔✔B
The scope of API 653 is limited to all of the following except?
A) Tank foundation
B) Tank bottom
C) Tank roof
D) Tank mixing motor ✔✔D
The API 653 standards states that many of requirements for design, welding and materials of API 650 and API-12C can be applied with regard to __________.
A) Repair, inspection, rating and alteration
B) Repair, personnel assignment, rating and alteration
C) Inspection, refinery equipment, electrical controls and repairs
D) Alteration, product in storage, rating and inspection ✔✔A
In the application of the requirements for welding, design and materials of API 650 or API-12C to in-service aboveground storage tanks (AST), which of the following code or standard takes precedence?
When design and construction details are not given and not available in the original construction standard, then details that will provide a level of integrity equal to the current edition of what Code or Standard must be used?
A) ASME Section VIII, Div. 1, Pressure vessels
B) ASME Section VIII, Div. 2, Alternative Rules for Pressure vessels
C) API 650
D) API-12C ✔✔C
Ultimate responsibility for compliance with this standard rests with ________.
A) The owner/operator
B) The owner/operator's inspector
C) The repair organization of owner/operator
D) The manufacturer of the AST ✔✔A
According API 653 if any provision presents a direct or implied conflict with any statutory regulation, the regulation governs. What governs if API 653 requirements are more stringent than the statutory regulation?
A) The statutory regulation applies in all cases
B) The conflict must be submitted to the API
C) The owner/operator has the option of applying the requirement best suited to the situation
D) The API 653 requirement shall govern ✔✔D
Safe working practices shall comply with what requirements concerning confined space entry?
A) Procedures must comply with any trade developed safety precautions
B) Procedures must comply with any federal or state regulations
C) Procedures need only comply with owner/operator requirements
D) Procedures need only comply with NFPA requirements ✔✔B
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 the 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
What factors are required for consideration when performing an evaluation for continued use of an AST?
During the inspection of fixed roof support members, particular attention must be given to
A) severe external corrosion of the roof plate support structures are attached
B) severe internal corrosion of pipe columns
C) severe internal corrosion of the roof plate where support structures are attached
D) deterioration of wind girders at the point of attachment ✔✔B
Inspection of floating roofs is limited to roof plates and pontoons
A) True
B) False ✔✔B
Evaluating of existing floating roofs shall be based on the criteria of
A) API 650, Ap. C, Ap. H
B) API 650, Par. 6.4.3, Par. 6.5.
C) ASME Sec. VIII, Div. I, Ap. C, Ap. H
D) ASME Sec. VIII, Div. II ✔✔A
What API Standard or RP must be used for evaluating the effects of design partial vacuum on tank roofs?
A) API 620
B) API 650
C) API 651
D) API 652 ✔✔A
Above what operating temperature shall API 650 Ap. M be conducted before changing the service?
A) 500 F
B) 400 F
C) 300 F
D) 200 F ✔✔D
Under what conditions may tank operated at a temperature lower than the original design?
A) When the requirements for impact testing of ASME Sec. VIII, Div. 1 have been met
B) When the requirements of API 650 have been met
C) When the requirements of ASTM A-370 have been met
A) shell distortions
B) flaws
C) discontinuities
D) severe damage ✔✔A
Shell distortions require the tank to be immediately removed from service and inspected.
A) True
B) False ✔✔B
Flaws such as cracks or laminations shall be thoroughly examined to determine their nature and extend and the need for repair.
A) True
B) False ✔✔A
What if anything should be done with cracks in the shell-to-bottom weld?
A) sealed with caulking and tank returned to service
B) the welds can have a cover weld pass applied over them to prevent leakage
C) cracks of this type are critical and the tank must be retired from service since repairs are prohibited
D) cracks in the shell-to-bottom weld are critical and shall be removed and repair ✔✔D
Internal pitting and pitting rates in the anticipated service, corrosion of weld joints (weld and heat affected zone), weld joint cracking history and stress placed on the bottom plates by roof support loads and shell settlement are all examples of causes of what type of failure?
A) annual ring failure
B) shell plate failure at first shell course
C) bottom failure
D) fatigue failure due to repeated jacking of floor plates ✔✔C
Underside corrosion (normally in the form of pitting), inadequate resulting in surface water flowing under the tank bottom, lack of an annular plate ring when required, uneven settlement that result in high localized stresses in the bottom plates, and inadequate provision for movement of roof support columns and other support are all examples of causes of what type of failure?
A) shell plate failure at first course
B) bottom failure
C) failure of support columns due to hydraulic compression
C) deterministic and probabilistic
D) detailed stress analysis and plate deformation measurement ✔✔C
Unless a stress analysis is performed, what is the minimum thickness of bottom plates in the critical zone?
A) smaller of 1/2 the original bottom thickness or 50% of tmin of the lower shell course but no less than 0.1 inch
B) smaller of 1/4 the original bottom thickness or 25% of tmin of the lower shell course but no less than 0.1 inch
C) smaller of 3/4 the original bottom thickness or 75% of tmin of the lower shell course but no less than 0.1 inch
D) smaller of 1/2 the original bottom thickness or 50% of tmin of the lower shell course but no less than 0.01 inch ✔✔A
When repairing internal pitting for the extension of in-service operating period, the repair shall be by any of the following methods except:
A) pit welding
B) brazing
C) overlay welding
D) lap patchin ✔✔B
The thickness of the bottom plate projection beyond the shell, measured at the toe of the weld of the outside bottom-to-shell filled weld shall be not less than?
A) 0,25"
B) 0,01"
C) 0,50"
D) 0,10" ✔✔D
The projection of the bottom plate beyond the shell-to-bottom weld shall be at least?
A) 0,125"
B) 0,250"
C) 0,375"
D) 0,500" ✔✔C
An AST contains a fluid with a specific gravity of less than one. The thickness of the plate in the first course is 7/8". What is the minimum thickness of the annular plate ring, seismic loading is not a consideration, and the stress in the first course is 27,850 pound per square inch?
A) 0,22"
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
Distortion of anchor bolts and excessive cracking of concrete structures may be indications of what two conditions?
A) serious foundation settlement of 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 caused movement of the tank ✔✔A
Incidents of tank failure due to brittle fracture have occurred shortly after erection during hydrostatic testing or in all but except which of the following incidents?
A) on the first filling in cold water
B) after a change to higher temperature service
C) after a change to lower temperature service
D) after repair or alteration ✔✔B
The risk of tank failure due to brittle fracture is minimal after what condition(s)?
A) The tank has demonstrated its ability to withstand the combined effects of maximum liquid level and highest operating temperature
B) The tank has demonstrated its ability to withstand the combined effects of intermediate liquid level and 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
If it 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
D) 12 ksi ✔✔B
What is the lowest temperature that a tank, constructed of carbon steel of unknown toughness, may be used? The maximum thickness of the shell is 0,625"
A) 40 F
B) 45 F
C) 50 F
D) 55 F ✔✔A
What is the purpose of Figure 5-1 of API 653?
A) provides a procedure to be used in the evaluation of the remaining life of tank bottom plates
B) provides a procedure to be used in the evaluation of the likelihood of floating roof pontoon failure
C) provides an assessment procedure for evaluating AST operating at 15 psi
D) provides an assessment procedure for evaluating AST ✔✔D
What is the purpose of periodic in-service inspection?
A) assure job security for inspectors
B) assure proper operation of AST
C) assure continued tank integrity
D) assure OSHA compliance ✔✔C
Of the following, which is not a consideration that must be addressed in determining inspection intervals for ASTs?
A) corrosion prevention systems
B) inspection interval of other equipment located near the tank under consideration
C) changes in service
D) previous inspection results ✔✔B
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
