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API 653 Exam Questions And Correct
Answers
ly 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 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)
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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 shell unless it is present in a severe and numerous form?
- CORRECT ANSWER>>Pitting (4.3.1.3)
When can widley scattered pits inside the tank shell be ignored? - CORRECT
ANSWER>>Provided that:
a) no pit depth results in the remaining shell thickness being less than one-half the
minimum acceptable tank shell
thickness exclusive of the corrosion allowance; and
b) the sum of their dimensions along any vertical line does not exceed 2 in. in an 8-in.
length (see Figure 4.2). (4.3.2.2).
A tank of a single butt-weld with a back-up bar construction, built to an
unknownstandard in 1940 is inspected. Corrosion is general and an evaluation of the
tank's minimum thickness is required. What joint factor would you use? - CORRECT
ANSWER>>E = 0.85. (Table 4.2)
What can foundation settlement cause to appear in the shell of an AST? - CORRECT
ANSWER>>Shell distortions. (4.3.5.2, 4.3.5.3)
Unless a stress analysis is performed what is the minimum bottom plate thickness in the
critical zone of the tank bottom? - CORRECT ANSWER>>the smaller of one-half the
original bottom plate thickness or 50 % of tmin of the lower shell course, but not less
than 0.1 in. (4.4.5.4)
API 653 Exam Questions And Correct
Answers
ly 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 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)
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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 shell unless it is present in a severe and numerous form?
- CORRECT ANSWER>>Pitting (4.3.1.3)
When can widley scattered pits inside the tank shell be ignored? - CORRECT
ANSWER>>Provided that:
a) no pit depth results in the remaining shell thickness being less than one-half the
minimum acceptable tank shell
thickness exclusive of the corrosion allowance; and
b) the sum of their dimensions along any vertical line does not exceed 2 in. in an 8-in.
length (see Figure 4.2). (4.3.2.2).
A tank of a single butt-weld with a back-up bar construction, built to an
unknownstandard in 1940 is inspected. Corrosion is general and an evaluation of the
tank's minimum thickness is required. What joint factor would you use? - CORRECT
ANSWER>>E = 0.85. (Table 4.2)
What can foundation settlement cause to appear in the shell of an AST? - CORRECT
ANSWER>>Shell distortions. (4.3.5.2, 4.3.5.3)
Unless a stress analysis is performed what is the minimum bottom plate thickness in the
critical zone of the tank bottom? - CORRECT ANSWER>>the smaller of one-half the
original bottom plate thickness or 50 % of tmin of the lower shell course, but not less
than 0.1 in. (4.4.5.4)
