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API 653 Exam Questions and Answers (Latest Update 2025)
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API 653 Exam Questions and Answers (Latest Update 2025)
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API 653 Exam Questions and Answers(Latest Update 2025)
API publications necessarily address problems of what type? -
Correct Answer ✅ Problems of a general nature. (Special
notes section)
API Standard 653 covers in service steel tanks built to what
standards? - Correct Answer ✅ This standard covers steel
storage tanks built to API 650 and its predecessor API 12C.
(1.1.1)
What API Standard always governs for tanks that have been
placed in service? - Correct Answer ✅ In the case of
apparent conflicts between the requirements of this standard
and API 650 or its predecessor API 12C, API 653 shall govern
for tanks that have been placed in service. (1.1.2)
API Standard 653 employs the design principles of what
standard? - Correct Answer ✅ This standard employs the
principles of API 650. (1.1.3)
When design and construction details are not given and are
not available in the standard to which the in service tank was
originally constructed, then details that will provide a level of
,API 653 Exam Questions and Answers
(Latest Update 2025)
integrity equal to the level provided by the current edition of
which standard must be used? - Correct Answer ✅ The
current edition of API 650 must be used. (1.1.5)
Who has the ultimate responsability for complying with the
provisions of API653? - Correct Answer ✅ The
owner/operator. (1.2)
The inspector agency of the jurisdiction in which the above
ground is storage tank is operated is called what? - Correct
Answer ✅ Authorized inspection agency (3.3)
An employee of an authorized inspection agency certified as
an AST inspector per API 653 Appendix D, is known as what? -
Correct Answer ✅ Authorized inspector (3.4)
What is the total metal loss divided by the period of time over
which the metal loss occurred? - Correct Answer ✅
Corrosion rate (3.9)
, API 653 Exam Questions and Answers
(Latest Update 2025)
What is the definition of a "repair" to a tank? - Correct
Answer ✅ Work necessary to maintain or restore a tank to a
condition suitable for safe operation. (3.24)
What must be done when the results of a tank inspection
show that a change has occurred from the original physical
condition of that tank? - Correct Answer ✅ An evaluation
shall be made to determine its suitability for continued use.
(4.1.1)
What must be done when the cone roof tank roof plates
corrode to an average thickness of less than 0.09" in any 100
in^2 area? - Correct Answer ✅ Shall be repaired or
replaced. (4.2.1.2)
What section of API 653 must be considered when changing
the service of a tank to operation at temperatures above
200F? - Correct Answer ✅ All requirements of API 650,
Appendix M. (4.2.4.3)
What form of corrosion does not normally represent a
significant threat to the overall structural integrity of the tank
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