API 653 CERTIFICATION CLOSED BOOK | QUESTIONS
AND VERIFIED ANSWERS | COMPREHENSIVE STUDY
GUIDE|A+ STUDY RESOURCE | BRAND NEW 2026/2027
UPDATE
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
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
The deterioration of metals exposed to soils is referred to as:
A) Moisture corrosion
B) soil resistivity
C) Soil Corrosion
D) Galvanic corrosion
C
,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
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
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
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
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
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
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
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
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 defect typically designates:
A) Minimum acceptability
B) An indication that is detectable but acceptable
AND VERIFIED ANSWERS | COMPREHENSIVE STUDY
GUIDE|A+ STUDY RESOURCE | BRAND NEW 2026/2027
UPDATE
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
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
The deterioration of metals exposed to soils is referred to as:
A) Moisture corrosion
B) soil resistivity
C) Soil Corrosion
D) Galvanic corrosion
C
,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
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
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
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
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
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
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
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
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 defect typically designates:
A) Minimum acceptability
B) An indication that is detectable but acceptable
