1|Page
API 635 CERTIFICATION EXAM LATEST 2026-2027 ACTUAL EXAM
WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS
(100% VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED|| ||BRANDNEW!!!||
What two methods may be used in quantifying the remaining
thickness of tank bottoms?
A) drilling and actual measurement
B) UT and RT
C) deterministic and probabilistic
D) detailed stress analysis and plate deformation measurement -
ANSWER-C
Unless a stress analysis is performed, what is the minimum
thickness of bottom plates in the critical zone?
A) smaller of 1/2 the original bottom thickness or 50% of tmin of
the lower shell course but no less than 0.1 inch
B) smaller of 1/4 the original bottom thickness or 25% of tmin of
the lower shell course but no less than 0.1 inch
C) smaller of 3/4 the original bottom thickness or 75% of tmin of
the lower shell course but no less than 0.1 inch
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D) smaller of 1/2 the original bottom thickness or 50% of tmin of
the lower shell course but no less than 0.01 inch - ANSWER-A
When repairing internal pitting for the extension of in-service
operating period, the repair shall be by any of the following
methods except:
A) pit welding
B) brazing
C) overlay welding
D) lap patchin - ANSWER-B
The thickness of the bottom plate projection beyond the shell,
measured at the toe of the weld of the outside bottom-to-shell
filled weld shall be not less than?
A) 0,25"
B) 0,01"
C) 0,50"
D) 0,10" - ANSWER-D
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The projection of the bottom plate beyond the shell-to-bottom
weld shall be at least?
A) 0,125"
B) 0,250"
C) 0,375"
D) 0,500" - ANSWER-C
An AST contains a fluid with a specific gravity of less than one.
The thickness of the plate in the first course is 7/8". What is the
minimum thickness of the annular plate ring, seismic loading is
not a consideration, and the stress in the first course is 27,850
pound per square inch?
A) 0,22"
B) 0,31"
C) 0,20"
D) 0,23" - ANSWER-B
An AST contains a fluid with a specific gravity of greater than one.
The thickness of the plate in the first course is 7/8". What is the
minimum thickness of the annular plate ring, seismic loading is
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not a consideration, and the stress in the first course is 27,850
pound per square inch?
A) 1/4"
B) 3/8"
C) 9/32"
D) 11/32" - ANSWER-C
Settlement, erosion, cracking and deterioration of concrete are all
examples of which of the following principle modes of failure or
deterioration?
A) annular plate ring failure
B) shell-to-bottom weld failure
C) deterioration of walkways and roadways
D) deterioration of foundations - ANSWER-D
To ensure suitability for service, what is the minimum permitted
frequency of tank foundation inspection?
A) annually
B) every five years
API 635 CERTIFICATION EXAM LATEST 2026-2027 ACTUAL EXAM
WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS
(100% VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED|| ||BRANDNEW!!!||
What two methods may be used in quantifying the remaining
thickness of tank bottoms?
A) drilling and actual measurement
B) UT and RT
C) deterministic and probabilistic
D) detailed stress analysis and plate deformation measurement -
ANSWER-C
Unless a stress analysis is performed, what is the minimum
thickness of bottom plates in the critical zone?
A) smaller of 1/2 the original bottom thickness or 50% of tmin of
the lower shell course but no less than 0.1 inch
B) smaller of 1/4 the original bottom thickness or 25% of tmin of
the lower shell course but no less than 0.1 inch
C) smaller of 3/4 the original bottom thickness or 75% of tmin of
the lower shell course but no less than 0.1 inch
,2|Page
D) smaller of 1/2 the original bottom thickness or 50% of tmin of
the lower shell course but no less than 0.01 inch - ANSWER-A
When repairing internal pitting for the extension of in-service
operating period, the repair shall be by any of the following
methods except:
A) pit welding
B) brazing
C) overlay welding
D) lap patchin - ANSWER-B
The thickness of the bottom plate projection beyond the shell,
measured at the toe of the weld of the outside bottom-to-shell
filled weld shall be not less than?
A) 0,25"
B) 0,01"
C) 0,50"
D) 0,10" - ANSWER-D
,3|Page
The projection of the bottom plate beyond the shell-to-bottom
weld shall be at least?
A) 0,125"
B) 0,250"
C) 0,375"
D) 0,500" - ANSWER-C
An AST contains a fluid with a specific gravity of less than one.
The thickness of the plate in the first course is 7/8". What is the
minimum thickness of the annular plate ring, seismic loading is
not a consideration, and the stress in the first course is 27,850
pound per square inch?
A) 0,22"
B) 0,31"
C) 0,20"
D) 0,23" - ANSWER-B
An AST contains a fluid with a specific gravity of greater than one.
The thickness of the plate in the first course is 7/8". What is the
minimum thickness of the annular plate ring, seismic loading is
, 4|Page
not a consideration, and the stress in the first course is 27,850
pound per square inch?
A) 1/4"
B) 3/8"
C) 9/32"
D) 11/32" - ANSWER-C
Settlement, erosion, cracking and deterioration of concrete are all
examples of which of the following principle modes of failure or
deterioration?
A) annular plate ring failure
B) shell-to-bottom weld failure
C) deterioration of walkways and roadways
D) deterioration of foundations - ANSWER-D
To ensure suitability for service, what is the minimum permitted
frequency of tank foundation inspection?
A) annually
B) every five years
