API 653 CLOSED BOOK QUIZ
EXAM WITH CORRECT
ANSWERS 2025
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 - correct answers -
C
API 653 provides the requirements for construction of which of the
following?
E) Process pressure vessels
F) Aboveground petroleum storage tanks
G) LNG Storage spheres
H) This standard does not provide construction requirements - correct
answers - D
API 653 provides for all but which of the following is not with regard to
aboveground storage tanks?
I) Repair
J) Operation
K) Relocation
L) Alteration - correct answers - B
The scope of API 653 is limited to all of the following except?
M)Tank foundation
N) Tank bottom
O) Tank roof
P) Tank mixing motor - correct answers - 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 .
Q)Repair, inspection, rating and alteration
R) Repair, personnel assignment, rating and alteration
S) Inspection, refinery equipment, electrical controls and repairs
T) Alteration, product in storage, rating and inspection - correct
answers - 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?
U) ASME Section VIII, Pressure Vessels
A
V)
+ API-12C
W)API 653
X) API 650 - correct answers - C
,The API 653 Standard may only be applied to AST that have been
constructed to and meet the requirements of API 650.
A) True
B) False - correct answers - B
The use of API 653 is intended for organizations that have personnel who
technically trained and experienced in which of the following?
C) All ASME, AWS, ASTN and API codes and standards
D) Tank design, fabrication, repair, construction and inspection
E)Refinery operations, safety requirements, personnel management
and refinery design
F) Mechanical integrity program, OSHA and Process Safety - correct
answers - B
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?
G) ASME Section VIII, Div. 1, Pressure vessels
H) ASME Section VIII, Div. 2, Alternative Rules for Pressure vessels
I) API 650
J) API-12C - correct answers - C
Ultimate responsibility for compliance with this standard rests with .
K) The owner/operator
L) The owner/operator's inspector
M)The repair organization of owner/operator
N) The manufacturer of the AST - correct answers - 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?
O) The statutory regulation applies in all cases
P) The conflict must be submitted to the API
Q)The owner/operator has the option of applying the requirement best
suited to the situation
R) The API 653 requirement shall govern - correct answers - D
Safe working practices shall comply with what requirements concerning
confined space entry?
S) Procedures must comply with any trade developed safety precautions
T) Procedures must comply with any federal or state regulations
U) Procedures need only comply with owner/operator requirements
V) Procedures need only comply with NFPA requirements- correct answers -
B
When must an evaluation, to determine the suitability for continued use, be
conducted?
A
+
, 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 -
correct answers -
A
What factors are required for consideration when performing an evaluation
for continued use of an AST?
E) only those listed in API 653
F)the recommended list of consideration provided in API 510 can be
modified to suit this purpose
G) Engineering analysis and judgment required for each situation
H) Only those items requested by the Certified AST inspector - correct
answers - C
Roof plates corroded to an average thickness of less that inch in any
square inch area
shall be repaired or replaced
I) 0.9 inch in any 100 square inch area
J) 0.09 inch in any 10 square inch area
K) 0.09 inch in any 144 square inch area (1 square foot)
L) 0.09 inch in any 100 square inch area- correct answers - D
The method of inspecting roof support members shall be acceptable to
whom?
M)manufacturer
N) inspector
O) owner/operator
P) operations manager - correct answers - B
During the inspection of fixed roof support members, particular attention
must be given to
Q)severe external corrosion of the roof plate support structures are
attached
R) severe internal corrosion of pipe columns
S) severe internal corrosion of the roof plate where support structures are
attached
T) deterioration of wind girders at the point of attachment - correct
answers - B
Inspection of floating roofs is limited to roof plates and pontoons
U) True
V) False - correct answers - B
Evaluating of existing floating roofs shall be based on the criteria of
W)API 650, Ap. C, Ap. H
A
X) API 650, Par. 6.4.3, Par. 6.5.3
+
Y) ASME Sec. VIII, Div. I, Ap. C, Ap. H
Z) ASME Sec. VIII, Div. II - correct answers - 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 - correct answers - A
Above what operating temperature shall API 650 Ap. M be conducted
before changing the service?
E) 500 F
F) 400 F
G) 300 F
H) 200 F - correct answers - D
Under what conditions may tank operated at a temperature lower than
the original design?
I) When the requirements for impact testing of ASME Sec. VIII, Div. 1
have been met
J) When the requirements of API 650 have been met
K) When the requirements of ASTM A-370 have been met
L) When the requirements of ASTM A-20 have been met - correct
answers - B
Flaws, deterioration or other conditions that might adversely affect the
performance or structural integrity of the shell of an existing tank must be
evaluated. Personnel experienced in tank design shall conduct the
evaluation. This analysis shall take into account any of the following
except:
M)fluid static head
N) internal and external pressure
O) organization that manufactured the tank
P) seismic loads - correct answers - C
Of the following, which is not an option available to the owner/operator
if it is not possible to satisfy the requirements for minimum thickness
calculations for a weld tanks?
Q)repair damaged area
R) reduce allowable liquid level
S) retire the tank
T)reduce the fill rate the tank fills slower and applies pressure
gradually -
correct answers - D
Out-of-roundness, buckled areas, flat spots and peaking and banding of
welded joints are all examples of
U) shell distortions
V) flaws
W)discontinuities
X) severe damage - correct answers - A
A
+
EXAM WITH CORRECT
ANSWERS 2025
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 - correct answers -
C
API 653 provides the requirements for construction of which of the
following?
E) Process pressure vessels
F) Aboveground petroleum storage tanks
G) LNG Storage spheres
H) This standard does not provide construction requirements - correct
answers - D
API 653 provides for all but which of the following is not with regard to
aboveground storage tanks?
I) Repair
J) Operation
K) Relocation
L) Alteration - correct answers - B
The scope of API 653 is limited to all of the following except?
M)Tank foundation
N) Tank bottom
O) Tank roof
P) Tank mixing motor - correct answers - 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 .
Q)Repair, inspection, rating and alteration
R) Repair, personnel assignment, rating and alteration
S) Inspection, refinery equipment, electrical controls and repairs
T) Alteration, product in storage, rating and inspection - correct
answers - 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?
U) ASME Section VIII, Pressure Vessels
A
V)
+ API-12C
W)API 653
X) API 650 - correct answers - C
,The API 653 Standard may only be applied to AST that have been
constructed to and meet the requirements of API 650.
A) True
B) False - correct answers - B
The use of API 653 is intended for organizations that have personnel who
technically trained and experienced in which of the following?
C) All ASME, AWS, ASTN and API codes and standards
D) Tank design, fabrication, repair, construction and inspection
E)Refinery operations, safety requirements, personnel management
and refinery design
F) Mechanical integrity program, OSHA and Process Safety - correct
answers - B
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?
G) ASME Section VIII, Div. 1, Pressure vessels
H) ASME Section VIII, Div. 2, Alternative Rules for Pressure vessels
I) API 650
J) API-12C - correct answers - C
Ultimate responsibility for compliance with this standard rests with .
K) The owner/operator
L) The owner/operator's inspector
M)The repair organization of owner/operator
N) The manufacturer of the AST - correct answers - 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?
O) The statutory regulation applies in all cases
P) The conflict must be submitted to the API
Q)The owner/operator has the option of applying the requirement best
suited to the situation
R) The API 653 requirement shall govern - correct answers - D
Safe working practices shall comply with what requirements concerning
confined space entry?
S) Procedures must comply with any trade developed safety precautions
T) Procedures must comply with any federal or state regulations
U) Procedures need only comply with owner/operator requirements
V) Procedures need only comply with NFPA requirements- correct answers -
B
When must an evaluation, to determine the suitability for continued use, be
conducted?
A
+
, 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 -
correct answers -
A
What factors are required for consideration when performing an evaluation
for continued use of an AST?
E) only those listed in API 653
F)the recommended list of consideration provided in API 510 can be
modified to suit this purpose
G) Engineering analysis and judgment required for each situation
H) Only those items requested by the Certified AST inspector - correct
answers - C
Roof plates corroded to an average thickness of less that inch in any
square inch area
shall be repaired or replaced
I) 0.9 inch in any 100 square inch area
J) 0.09 inch in any 10 square inch area
K) 0.09 inch in any 144 square inch area (1 square foot)
L) 0.09 inch in any 100 square inch area- correct answers - D
The method of inspecting roof support members shall be acceptable to
whom?
M)manufacturer
N) inspector
O) owner/operator
P) operations manager - correct answers - B
During the inspection of fixed roof support members, particular attention
must be given to
Q)severe external corrosion of the roof plate support structures are
attached
R) severe internal corrosion of pipe columns
S) severe internal corrosion of the roof plate where support structures are
attached
T) deterioration of wind girders at the point of attachment - correct
answers - B
Inspection of floating roofs is limited to roof plates and pontoons
U) True
V) False - correct answers - B
Evaluating of existing floating roofs shall be based on the criteria of
W)API 650, Ap. C, Ap. H
A
X) API 650, Par. 6.4.3, Par. 6.5.3
+
Y) ASME Sec. VIII, Div. I, Ap. C, Ap. H
Z) ASME Sec. VIII, Div. II - correct answers - 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 - correct answers - A
Above what operating temperature shall API 650 Ap. M be conducted
before changing the service?
E) 500 F
F) 400 F
G) 300 F
H) 200 F - correct answers - D
Under what conditions may tank operated at a temperature lower than
the original design?
I) When the requirements for impact testing of ASME Sec. VIII, Div. 1
have been met
J) When the requirements of API 650 have been met
K) When the requirements of ASTM A-370 have been met
L) When the requirements of ASTM A-20 have been met - correct
answers - B
Flaws, deterioration or other conditions that might adversely affect the
performance or structural integrity of the shell of an existing tank must be
evaluated. Personnel experienced in tank design shall conduct the
evaluation. This analysis shall take into account any of the following
except:
M)fluid static head
N) internal and external pressure
O) organization that manufactured the tank
P) seismic loads - correct answers - C
Of the following, which is not an option available to the owner/operator
if it is not possible to satisfy the requirements for minimum thickness
calculations for a weld tanks?
Q)repair damaged area
R) reduce allowable liquid level
S) retire the tank
T)reduce the fill rate the tank fills slower and applies pressure
gradually -
correct answers - D
Out-of-roundness, buckled areas, flat spots and peaking and banding of
welded joints are all examples of
U) shell distortions
V) flaws
W)discontinuities
X) severe damage - correct answers - A
A
+
