Page 1 of 227
API 653 EXAM PREP CLOSED BOOK ONLY
(API 653 EXAM TEST QUESTIONS - CLOSED
BOOK) LATEST QUESTIONS & ANSWERS
VERIFIED 100% CORRECT
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
,Page 2 of 227
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
Atmospheric storage tanks are defined as tanks designed to
withstand an internal pressure of:
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
,Page 3 of 227
exceeding 2.5 psi gauge. This distinguishes them from pressure
vessels which operate at higher pressures .
Question 3
What is the definition of a "major repair" according to API
653?
A) Any repair requiring welding
B) The complete or partial removal and replacement of more
than 12 inches of a vertical weld joining shell plates
C) Any repair costing more than $10,000
D) Replacement of roof plates
Answer: B) The complete or partial removal and
replacement of more than 12 inches of a vertical weld
joining shell plates
Rationale: API 653 specifically defines major repair as the
complete or partial removal and replacement of more than 12
, Page 4 of 227
inches of a vertical weld joining shell plates. This threshold
triggers specific inspection and documentation requirements .
Question 4
A "change in service" is defined as:
A) Any change in ownership of the tank
B) A change from previous operating conditions involving
different properties of the stored product such as specific
gravity or corrosivity
C) Changing the tank's nameplate
D) Routine product variation within specifications
Answer: B) A change from previous operating conditions
involving different properties of the stored product such as
specific gravity or corrosivity
Rationale: API 653 defines a change in service as a
modification to operating conditions that involves different
product properties (specific gravity, corrosivity) or different
API 653 EXAM PREP CLOSED BOOK ONLY
(API 653 EXAM TEST QUESTIONS - CLOSED
BOOK) LATEST QUESTIONS & ANSWERS
VERIFIED 100% CORRECT
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
,Page 2 of 227
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
Atmospheric storage tanks are defined as tanks designed to
withstand an internal pressure of:
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
,Page 3 of 227
exceeding 2.5 psi gauge. This distinguishes them from pressure
vessels which operate at higher pressures .
Question 3
What is the definition of a "major repair" according to API
653?
A) Any repair requiring welding
B) The complete or partial removal and replacement of more
than 12 inches of a vertical weld joining shell plates
C) Any repair costing more than $10,000
D) Replacement of roof plates
Answer: B) The complete or partial removal and
replacement of more than 12 inches of a vertical weld
joining shell plates
Rationale: API 653 specifically defines major repair as the
complete or partial removal and replacement of more than 12
, Page 4 of 227
inches of a vertical weld joining shell plates. This threshold
triggers specific inspection and documentation requirements .
Question 4
A "change in service" is defined as:
A) Any change in ownership of the tank
B) A change from previous operating conditions involving
different properties of the stored product such as specific
gravity or corrosivity
C) Changing the tank's nameplate
D) Routine product variation within specifications
Answer: B) A change from previous operating conditions
involving different properties of the stored product such as
specific gravity or corrosivity
Rationale: API 653 defines a change in service as a
modification to operating conditions that involves different
product properties (specific gravity, corrosivity) or different
