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API 635 CERTIFICATION EXAM NEWEST 2025/ 2026
ACTUAL EXAM COMPLETE 250 QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES
(VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW EXAM!!!
The edge of any vertical weld joint attaching a
replacement plate shall be at least how far from the edge
of the weld joint in the annular plate ring or sketch plate?
a) Eight inches
b) Ten inches
c) Twelve inches
d) Six inches - ANSWER-C
Lapped patch shell repairs are an acceptable form of
repair for butt-welded, lap-welded, and riveted tank shell
only when specified by:
a) The Authorized Inspector
b) Repair organization
c) The insurance company
d) The owner/operator - ANSWER-D
Lapped patch shell repairs are not permitted on shell
courses exceeding what thickness?
,2|Page
a) ½ inch
b) ¾ inch
c) 1 inch
d) 1 ¼ inch - ANSWER-A
When a lapped patch shell repair is used, what is the
minimum thickness permitted for the repair plate?
a) Not less than .25 inch
b) Not less than . 1875 inch
c) Not less than .50 inch
d) Not less than .375 inch - ANSWER-B
Repair plates for lapped patch repairs may square or
rectangular in shape. These plates must be provided with
a corner radius of at least what dimension?
a) They shall be rounded to a minimum radius of 1 inch
b) They shall be rounded to a minimum radius of 2 inches
c) They shall be rounded to a minimum radius of 3 inches
d) They shall be rounded to a minimum radius of 4 inches
- ANSWER-B
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The maximum dimension of the lapped patch repair plate
vertically and horizontally shall not exceed:
a) 24 inches vertically and 36 inches horizontally
b) 36 inches vertically and 48 inches horizontally
c) 48 inches vertically and 72 inches horizontally
d) There are no maximum dimensions - ANSWER-D
The minimum lapped patch repair plate dimension is what
length?
a) 6 inches
b) 8 inches
c) 10 inches
d) 12 inches - ANSWER-A
Is it permissible to install a shell opening and its
reinforcement within a properly designed lapped patch
shell repair?
a) Yes
b) No - ANSWER-B
When a lapped patch repair plate is used to reinforce the
thickness of a shell, which of the following is correct?
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a) The repair plate thickness shall be based on the latest
edition of API-650 and 653 using a joint efficiency not
exceeding 0.35
b) The repair plate thickness shall be based on the
applicable standard of construction and API Standard 653
using a joint efficiency not exceeding 0.35
c) The repair plate thickness shall be based on the latest
edition of API-650 and 653 using a joint efficiency not
exceeding 0.70
d) The repair plate thickness shall be based on the
applicable standard of construction and API Standard 650
using a joint efficiency not exceeding 0.70 - ANSWER-B
With regard to the thickness of the repair plate at the
perimeter of the repair plate, when a lapped patch repair
plate is used to reinforce the thickness of a shell, which of
the following is correct?
a) The repair plate shall not exceed the thickness of the
shell plate by more than ¼th but no more than 1/8th inch.
The maximum repair plate thickness is l/2 inch.
b) The repair plate shall not exceed the thickness of the
shell plate by more than 1/3 rd but no more than l/4 th
inch. The maximum repair plate thickness is l/2inch.
c) The repair plate shall not exceed the thickness of the
shell plate by more than 1/3 rd but no more than l/8 th
inch. The maximum repair plate thickness is l/2 inch.
API 635 CERTIFICATION EXAM NEWEST 2025/ 2026
ACTUAL EXAM COMPLETE 250 QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES
(VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW EXAM!!!
The edge of any vertical weld joint attaching a
replacement plate shall be at least how far from the edge
of the weld joint in the annular plate ring or sketch plate?
a) Eight inches
b) Ten inches
c) Twelve inches
d) Six inches - ANSWER-C
Lapped patch shell repairs are an acceptable form of
repair for butt-welded, lap-welded, and riveted tank shell
only when specified by:
a) The Authorized Inspector
b) Repair organization
c) The insurance company
d) The owner/operator - ANSWER-D
Lapped patch shell repairs are not permitted on shell
courses exceeding what thickness?
,2|Page
a) ½ inch
b) ¾ inch
c) 1 inch
d) 1 ¼ inch - ANSWER-A
When a lapped patch shell repair is used, what is the
minimum thickness permitted for the repair plate?
a) Not less than .25 inch
b) Not less than . 1875 inch
c) Not less than .50 inch
d) Not less than .375 inch - ANSWER-B
Repair plates for lapped patch repairs may square or
rectangular in shape. These plates must be provided with
a corner radius of at least what dimension?
a) They shall be rounded to a minimum radius of 1 inch
b) They shall be rounded to a minimum radius of 2 inches
c) They shall be rounded to a minimum radius of 3 inches
d) They shall be rounded to a minimum radius of 4 inches
- ANSWER-B
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The maximum dimension of the lapped patch repair plate
vertically and horizontally shall not exceed:
a) 24 inches vertically and 36 inches horizontally
b) 36 inches vertically and 48 inches horizontally
c) 48 inches vertically and 72 inches horizontally
d) There are no maximum dimensions - ANSWER-D
The minimum lapped patch repair plate dimension is what
length?
a) 6 inches
b) 8 inches
c) 10 inches
d) 12 inches - ANSWER-A
Is it permissible to install a shell opening and its
reinforcement within a properly designed lapped patch
shell repair?
a) Yes
b) No - ANSWER-B
When a lapped patch repair plate is used to reinforce the
thickness of a shell, which of the following is correct?
, 4|Page
a) The repair plate thickness shall be based on the latest
edition of API-650 and 653 using a joint efficiency not
exceeding 0.35
b) The repair plate thickness shall be based on the
applicable standard of construction and API Standard 653
using a joint efficiency not exceeding 0.35
c) The repair plate thickness shall be based on the latest
edition of API-650 and 653 using a joint efficiency not
exceeding 0.70
d) The repair plate thickness shall be based on the
applicable standard of construction and API Standard 650
using a joint efficiency not exceeding 0.70 - ANSWER-B
With regard to the thickness of the repair plate at the
perimeter of the repair plate, when a lapped patch repair
plate is used to reinforce the thickness of a shell, which of
the following is correct?
a) The repair plate shall not exceed the thickness of the
shell plate by more than ¼th but no more than 1/8th inch.
The maximum repair plate thickness is l/2 inch.
b) The repair plate shall not exceed the thickness of the
shell plate by more than 1/3 rd but no more than l/4 th
inch. The maximum repair plate thickness is l/2inch.
c) The repair plate shall not exceed the thickness of the
shell plate by more than 1/3 rd but no more than l/8 th
inch. The maximum repair plate thickness is l/2 inch.
