API 653 Certification Closed-Book Exam
QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADRED A+.
Question 1: Which standard governs the inspection, repair, alteration, and
reconstruction of aboveground storage tanks?
A) API 570
B) API 510
C) API 653
D) API 579
Answer: C) API 653
Rationale: API Standard 653 is specifically titled "Tank Inspection, Repair, Alteration, and
Reconstruction" and is the governing code for aboveground storage tanks. API 570 covers
piping inspection, API 510 covers pressure vessel inspection, and API 579 covers fitness-
for-service .
Question 2: What is the maximum internal pressure for an atmospheric storage
tank as defined in API 653?
A) Up to 15 psi gauge
B) Up to 2.5 psi gauge
C) Up to 5 psi gauge
D) Up to 0.5 psi gauge
Answer: B) Up to 2.5 psi gauge
Rationale: API 653 defines atmospheric storage tanks as those designed to withstand an
internal pressure up to but not exceeding 2.5 psi gauge. Higher pressure tanks fall under
API 620 or pressure vessel codes .
,Question 3: API 653 covers which 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
Answer: C) Carbon and low alloy steel tanks built to API 650 and 12C
Rationale: API 653 applies to aboveground storage tanks constructed to API 650 or API
12C standards. It does not cover ASME pressure vessels or API 510 equipment .
Question 4: Which of the following is NOT within the scope of API 653 for
aboveground storage tanks?
A) Repair
B) Operation
C) Relocation
D) Alteration
Answer: B) Operation
Rationale: API 653 provides requirements for repair, inspection, alteration, and
reconstruction (including relocation) of aboveground storage tanks. Operational
requirements are covered by other standards .
Question 5: The use of API 653 is intended for organizations that have personnel
trained in which areas?
A) All ASME, AWS, ASTM, 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, and Process Safety Management
,Answer: B) Tank design, fabrication, repair, construction, and inspection
Rationale: The code assumes owner/operators have or have access to personnel with
technical knowledge of tank design, fabrication, repair, construction, and inspection .
Question 6: Ultimate responsibility for compliance with API 653 rests with ________.
A) The owner/operator
B) The owner/operator's inspector
C) The repair organization
D) The manufacturer of the AST
Answer: A) The owner/operator
Rationale: Even when owners/operators contract work to others, the legal and code
compliance responsibility remains with the owner/operator .
Question 7: When design and construction details are not available in the original
construction standard, what code must be used?
A) ASME Section VIII, Div. 1
B) ASME Section VIII, Div. 2
C) API 650
D) API-12C
Answer: C) API 650
Rationale: When design and construction details are not given in the original construction
standard, details that provide a level of integrity equal to the current edition of API 650
must be used .
Question 8: In the application of requirements from API 650 or API-12C to in-
service tanks, which code takes precedence?
A) ASME Section VIII
B) API-12C
, C) API 653
D) API 650
Answer: C) API 653
Rationale: API 653 takes precedence when applying API 650 or API-12C requirements to
in-service aboveground storage tanks .
Definitions & Key Terms
Question 9: An "attendant" is defined as:
A) The person performing the inspection
B) An individual stationed outside a permit space who monitors entrants and orders
evacuation
C) Any worker inside the tank
D) The safety supervisor
Answer: B) An individual stationed outside a permit space who monitors entrants
and orders evacuation if unsafe conditions develop
Rationale: The attendant has specific responsibilities including monitoring authorized
entrants, maintaining communication, and ordering evacuation when unsafe conditions
are detected. This role is critical for permit-required confined space entry .
Question 10: A "confined space" is defined as having which characteristics?
A) Large enough to enter and restricted means of entry
B) Not designed for continuous occupancy
C) Large enough to enter, restricted means of entry, and not designed for continuous
occupancy
D) Any space with limited ventilation
Answer: C) Large enough to enter, restricted means of entry, and not designed for
continuous occupancy
Rationale: All three conditions must be met for a space to be classified as a confined space.
This classification triggers specific safety requirements for entry .
QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADRED A+.
Question 1: Which standard governs the inspection, repair, alteration, and
reconstruction of aboveground storage tanks?
A) API 570
B) API 510
C) API 653
D) API 579
Answer: C) API 653
Rationale: API Standard 653 is specifically titled "Tank Inspection, Repair, Alteration, and
Reconstruction" and is the governing code for aboveground storage tanks. API 570 covers
piping inspection, API 510 covers pressure vessel inspection, and API 579 covers fitness-
for-service .
Question 2: What is the maximum internal pressure for an atmospheric storage
tank as defined in API 653?
A) Up to 15 psi gauge
B) Up to 2.5 psi gauge
C) Up to 5 psi gauge
D) Up to 0.5 psi gauge
Answer: B) Up to 2.5 psi gauge
Rationale: API 653 defines atmospheric storage tanks as those designed to withstand an
internal pressure up to but not exceeding 2.5 psi gauge. Higher pressure tanks fall under
API 620 or pressure vessel codes .
,Question 3: API 653 covers which 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
Answer: C) Carbon and low alloy steel tanks built to API 650 and 12C
Rationale: API 653 applies to aboveground storage tanks constructed to API 650 or API
12C standards. It does not cover ASME pressure vessels or API 510 equipment .
Question 4: Which of the following is NOT within the scope of API 653 for
aboveground storage tanks?
A) Repair
B) Operation
C) Relocation
D) Alteration
Answer: B) Operation
Rationale: API 653 provides requirements for repair, inspection, alteration, and
reconstruction (including relocation) of aboveground storage tanks. Operational
requirements are covered by other standards .
Question 5: The use of API 653 is intended for organizations that have personnel
trained in which areas?
A) All ASME, AWS, ASTM, 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, and Process Safety Management
,Answer: B) Tank design, fabrication, repair, construction, and inspection
Rationale: The code assumes owner/operators have or have access to personnel with
technical knowledge of tank design, fabrication, repair, construction, and inspection .
Question 6: Ultimate responsibility for compliance with API 653 rests with ________.
A) The owner/operator
B) The owner/operator's inspector
C) The repair organization
D) The manufacturer of the AST
Answer: A) The owner/operator
Rationale: Even when owners/operators contract work to others, the legal and code
compliance responsibility remains with the owner/operator .
Question 7: When design and construction details are not available in the original
construction standard, what code must be used?
A) ASME Section VIII, Div. 1
B) ASME Section VIII, Div. 2
C) API 650
D) API-12C
Answer: C) API 650
Rationale: When design and construction details are not given in the original construction
standard, details that provide a level of integrity equal to the current edition of API 650
must be used .
Question 8: In the application of requirements from API 650 or API-12C to in-
service tanks, which code takes precedence?
A) ASME Section VIII
B) API-12C
, C) API 653
D) API 650
Answer: C) API 653
Rationale: API 653 takes precedence when applying API 650 or API-12C requirements to
in-service aboveground storage tanks .
Definitions & Key Terms
Question 9: An "attendant" is defined as:
A) The person performing the inspection
B) An individual stationed outside a permit space who monitors entrants and orders
evacuation
C) Any worker inside the tank
D) The safety supervisor
Answer: B) An individual stationed outside a permit space who monitors entrants
and orders evacuation if unsafe conditions develop
Rationale: The attendant has specific responsibilities including monitoring authorized
entrants, maintaining communication, and ordering evacuation when unsafe conditions
are detected. This role is critical for permit-required confined space entry .
Question 10: A "confined space" is defined as having which characteristics?
A) Large enough to enter and restricted means of entry
B) Not designed for continuous occupancy
C) Large enough to enter, restricted means of entry, and not designed for continuous
occupancy
D) Any space with limited ventilation
Answer: C) Large enough to enter, restricted means of entry, and not designed for
continuous occupancy
Rationale: All three conditions must be met for a space to be classified as a confined space.
This classification triggers specific safety requirements for entry .
