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API 635 CERTIFICATION EXAM NEWEST 2025/2026 ACTUAL
EXAM COMPLETE 250 QUESTIONS AND 100% CORRECT
DETAILED ANSWERS (VERIFIED AND GRADED A+)
The minimum dimension for a replacement shall plate shall
be_______ inches or __________ thickness of the replacement
plate whichever is_______.
a) 12, 12, greater
b) 12, 12, lesser
c) 18, 18, greater
d) 18, 18, lesser - ANSWER-A
Unless an entire shell plate is replaced, the replacement plate
may be circular, oblong, square or rectangular provide the corners
are
a) Provided with a radius of at least 1 inch
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b) Provided with a radius of at least 3% of the short dimension of
the plate
c) Provided with a radius of at least 3 inches
d) Provided with rounded corners - ANSWER-D
Prior to welding the new vertical joints, the existing horizontal
joints shall be cut for a minimum distance of _______ inches
beyond the new vertical joints.
a) Six
b) Eight
c) Twelve
d) Sixteen - ANSWER-C
Vertical joints shall be welded before the horizontal joints.
a) True
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b) False - ANSWER-A
For existing shell plates over ½ " thick, the outer edge of the butt
weld, attaching the replacement shell plate shall be at least
_______ times the weld thickness or _______ inches whichever
is greater from the outer edge of any existing butt-welded shell
joints.
a) 12, 10
b) 10, 12
c) 8, 10
d) 10, 8 - ANSWER-C
For existing shell plates ½ " thick and less, the outer edge of the
butt weld, attaching the replacement shell plate may be reduced
to _______ inches from the outer edge of vertical joints or
_______inches from the outer edge of horizontal joints.
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a) 10, 8
b) 9, 6
c) 6, 9
d) 6, 3 - ANSWER-D
For existing shell plates over 1/2" thick, the outer edge of the butt
weld, attaching the replacement shell plate shall be at least
_______ times the weld size or _______ inches, whichever is
greater, from the edge (toe) of the fillet weld attaching the bottom
shell course to the bottom. This rule does not apply if the
replacement shell plate extends to and intersects with the bottom-
to-shell joint at approximately _______ degrees.
a) 8, 10, 45
b) 8, 10, 90
c) 8, 10, 60
d) There are no exceptions - ANSWER-B
API 635 CERTIFICATION EXAM NEWEST 2025/2026 ACTUAL
EXAM COMPLETE 250 QUESTIONS AND 100% CORRECT
DETAILED ANSWERS (VERIFIED AND GRADED A+)
The minimum dimension for a replacement shall plate shall
be_______ inches or __________ thickness of the replacement
plate whichever is_______.
a) 12, 12, greater
b) 12, 12, lesser
c) 18, 18, greater
d) 18, 18, lesser - ANSWER-A
Unless an entire shell plate is replaced, the replacement plate
may be circular, oblong, square or rectangular provide the corners
are
a) Provided with a radius of at least 1 inch
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b) Provided with a radius of at least 3% of the short dimension of
the plate
c) Provided with a radius of at least 3 inches
d) Provided with rounded corners - ANSWER-D
Prior to welding the new vertical joints, the existing horizontal
joints shall be cut for a minimum distance of _______ inches
beyond the new vertical joints.
a) Six
b) Eight
c) Twelve
d) Sixteen - ANSWER-C
Vertical joints shall be welded before the horizontal joints.
a) True
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b) False - ANSWER-A
For existing shell plates over ½ " thick, the outer edge of the butt
weld, attaching the replacement shell plate shall be at least
_______ times the weld thickness or _______ inches whichever
is greater from the outer edge of any existing butt-welded shell
joints.
a) 12, 10
b) 10, 12
c) 8, 10
d) 10, 8 - ANSWER-C
For existing shell plates ½ " thick and less, the outer edge of the
butt weld, attaching the replacement shell plate may be reduced
to _______ inches from the outer edge of vertical joints or
_______inches from the outer edge of horizontal joints.
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a) 10, 8
b) 9, 6
c) 6, 9
d) 6, 3 - ANSWER-D
For existing shell plates over 1/2" thick, the outer edge of the butt
weld, attaching the replacement shell plate shall be at least
_______ times the weld size or _______ inches, whichever is
greater, from the edge (toe) of the fillet weld attaching the bottom
shell course to the bottom. This rule does not apply if the
replacement shell plate extends to and intersects with the bottom-
to-shell joint at approximately _______ degrees.
a) 8, 10, 45
b) 8, 10, 90
c) 8, 10, 60
d) There are no exceptions - ANSWER-B
