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Exam (elaborations)

API 653 EXAM QUESTIONS AND ANSWERS FULLY SOLVED

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Exam of 44 pages for the course Api 653 at Api 653 (API 653 EXAM)

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Api 653
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Institution
Api 653
Course
Api 653

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Uploaded on
August 15, 2025
Number of pages
44
Written in
2025/2026
Type
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API 653 EXAM

SECTION 1,,2,3

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 - answerC

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 - answerD

API-653 provides for all but which of the following with regard to aboveground storage
tanks?
a) Repair
b) Operation
c) Relocation
d) Alteration - answerB

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 - answerD

The API-653 standards states that many of the 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, maintenance, and inspection.
c) Inspection, product in storage, rating, and alteration.
d) Alteration, refinery equipment, electrical controls, and repair. - answerA

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?
a) ASME Section VIII, Pressure Vessels

,b) API-12C
c) API-653
d) API-650 - answerC

The API-653 Standard may only be applied to aboveground storage tanks (AST) that
have been
constructed to and meet the requirements of API-650.
a) True
b) False - answerB

The use of API-653 is intended for organizations that have personnel who are
technically trained
and experienced in which of the following?
a) All ASME, AWS, ASNT, and API Codes and Standards
b) Tank design, fabrication, repair, construction, and inspection
c) Refinery operations, safety requirements, personnel management, and refinery
design
d) Mechanical integrity program, OSHA regulations compliance program, and Process
Safety
Management - answerB

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, Division 1, Pressure Vessels
b) ASME Section VIII Division 2, Alternative Rules for Pressure Vessels
c) API- 650, Welded Steel Tanks for Oil Storage
d) API-12C Steel Storage Tanks for Oil Storage - answerC

Ultimate responsibility for compliance with this standard rests with ____?
a) The Owner/Operator
b) The Owner/Operator's Inspector
c) The repair organization of the Owner/Operator
d) The manufacturer of the AST - answerA

According to 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 American Petroleum Institute for resolution
c) The owner/operator has the option of applying the requirement best suited to the
situation

,d) The API-653 requirements shall govern - answerD

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/s requirements
d) Procedures need only comply with NFPA requirements - answerB

SECTION 4

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 - answerA

What factors are required for consideration when performing an evaluation for continued
use of an
AST?
a) Only those listed in API-653
b) The recommended list of considerations provided in API-510 can be modified to suit
this
purpose
c) Engineering analysis and judgement required for each situation
d) Only those items requested by the Certified Aboveground Storage Tank Inspector -
answerC

Roof plates corroded to an average thickness of less that ____ inch in any ___ square
inch area
shall be repaired of replaced.
a) 0.9 inch in any 100 square inch area
b) 0.09 inch in any 10 square inch area
c) 0.09 inch in any 144 square inch area (1 square foot)
d) 0.09 inch in any 100 square inch area - answerD

The method of inspecting roof support members shall be acceptable to whom?
a) The manufacturer of the AST
b) The responsible inspector
c) The Owner/Operator's design engineering department
d) The operations manager - answerB

, During the inspection of fixed roof support members, particular attention must be given
to .
a) Severe external corrosion of the roof plate where 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 - answerB

Inspection of floating roofs is limited to roof plates and pontoons.
a) True
b) False - answerB

Evaluation of existing floating roofs shall be based on the criteria of
a) API-650, Appendix C for external floating roofs and Appendix H for internal floating
roofs
b) API-510 Paragraph 6.4.3 for external floating roofs and 6.5.3 for internal
c) ASME Section VIII, Div 1 Appendix C for external floating roofs and Appendix H for
internal
d) ASME Section VIII, Div. 2 Alternative Rules - answerA

What API Standard or Recommended Practice must be used for evaluating the effects
of design
partial vacuum on tank roofs?
a) API Standard 620
b) API Standard 650
c) API Recommended Practice 651
d) API Recommended Practice 652 - answerA

Above what operating temperature shall API Standard 650, Appendix M, be considered
before
changing the service of a tank?
a) 500°F
b) 400°F
c) 300°F
d) 200°F - answerD

Under what conditions may a tank be operated at a temperature lower than the original
design?
a) When the requirements for impact testing of ASME Section VIII, Div, 1 have been
met
b) When the requirements of the applicable standard or API Standard 650 have been
met
c) When the requirements of ASTM Specification A-370 have been met
d) When the requirements of ASTM Specification A-20 have been met - answerB

Flaws, deterioration, or other conditions that might adversely affect the performance or
structural

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