API 653 Covering all Codes and Standards Exam Questions and Correct Verified Answers
__________ is a change from previous operating conditions involving different properties of the
stored product such as specific gravity or corrosivity and / or different service conditions of
temperature and / or pressure"
(a) Re-rating;
(b) Change in service;
(c) Repair;
(d) Reconstruction - Answer-B
A __________ is a device used to determine the image quality of a radiograph.
(a) A step wedge comparison film; (b) A densitometer;
(c) A penetramter
(d) All of the above. - Answer-C
A corroded roof plate is found to have an average thickness of 0.1" measured over an area of
100 sq. inches. This area shall be :-
(a) Repaired or replaced;
(b) Found to be acceptable;
(c) Repair is prohibited;
(d) Replacement is mandated - Answer-B
A double-welded butt joint is defined as :-
(a) A joint between two members that intersect at an angle between 0 degrees (a butt joint)
and 90 degrees (a corner joint).
,(b) A joint between two abutting parts lying in approximately the same plane that is welded
from both sides.
(c) A joint whose size is equal to the thickness of the thinner jointed member.
(d) A joint between two overlapping members in which the overlapped edge is welded. - Answer-B
An external floating roof shall be provided with at least one manhole having a minimum
inside diameter of __________ inches.
(a) 18;
(b) 15;
(c) 24;
(d) 30. - Answer-C
A formal Visual External inspection by a qualified inspector shall be done atleast :-
(a) Every 5 years of ¼ CR life whichever is less
(b) Every 5 years of ½ CR life whichever is less
(c) Every 2 years
(d) Every 1- years or ¼ CR life whichever is greater - Answer-A
A full hydrostatic test (when required) shall be held for __________ hours :-
(a) 24;
(b) 8;
(c) 18;
(d) 12 - Answer-A
A full-fillet weld is a weld that :-
,(a) not less than 1/3 the thinner plate;
(b) the legs equal the thickness of the thinner plate;
(c) the largest isosceles triangle that can be inscribed within the cross section of the weld
(d) is atleast the thickness of the thicker plate - Answer-B
A hot tap in a 1.25" thick tank with a minimum metal temperature of 65oF at time of hot tap,
without having material toughness data is :-
(a) not permitted;
(b) permitted;
(c) not enough information;
(d) not addressed by the code - Answer-A
A hydrostatic test for a relocated tank :-
(a) may be waived by the Owner / Operator;
(b) is required;
(c) may be waived by the Inspector; (d) is not necessary - Answer-B
A liquid penetrant examiner must have vision to enable him to read Jagger Type 2 standard
chart at a distance of not less than 12 inches and is capable of distinguishing and
differentiating contrast between colours used. Examiners shall be checked __________ to
ensure that they meet these requirements :-
(a) Quarterly;
(b) Semi-Annually;
(c) Annually;
(d) Bi-Annually. - Answer-C
, A procedure qualification record (PQR) shall address :-
(a) non-essential variables;
(b) (b) essential variables;
(c) supplemental essential variables (when required);
(d) (d) both (b) and (c) - Answer-D
A radiograph is made using an X-ray source and two films in each film holder. For composite
viewing, each film of the composite shall have a minimum density of :-
(a) 4.0; (b) 1.8; (c) 2.0; (d) 1.3 - Answer-D
A reconstructed tank with a total height of 25' has been determined to have an out-ofplumbness
of 2-3/4". This is :-
(a) acceptable; (b) unacceptable;
(c) not covered by the code (d) corrected by eternal strengthening - Answer-A
A riveted tank shell with a butt joint has 3 rows. What is the joint efficiency ?
(a) 0.75"; (b) 0.85"; (c) 0.90; (d) 0.91. - Answer-B
A SAW welding operator is attempting to quality by radiography on a 6 inch thick test
coupon. Elongated slag inclusions are measured to be 0.2 inch long.
(a) Must weld 2 additional coupons; (b) meets the requirements (passes)
(c) slag must not exceed 0.5" (d) slag is not acceptable. - Answer-B
A self-supporting cone roof :-
__________ is a change from previous operating conditions involving different properties of the
stored product such as specific gravity or corrosivity and / or different service conditions of
temperature and / or pressure"
(a) Re-rating;
(b) Change in service;
(c) Repair;
(d) Reconstruction - Answer-B
A __________ is a device used to determine the image quality of a radiograph.
(a) A step wedge comparison film; (b) A densitometer;
(c) A penetramter
(d) All of the above. - Answer-C
A corroded roof plate is found to have an average thickness of 0.1" measured over an area of
100 sq. inches. This area shall be :-
(a) Repaired or replaced;
(b) Found to be acceptable;
(c) Repair is prohibited;
(d) Replacement is mandated - Answer-B
A double-welded butt joint is defined as :-
(a) A joint between two members that intersect at an angle between 0 degrees (a butt joint)
and 90 degrees (a corner joint).
,(b) A joint between two abutting parts lying in approximately the same plane that is welded
from both sides.
(c) A joint whose size is equal to the thickness of the thinner jointed member.
(d) A joint between two overlapping members in which the overlapped edge is welded. - Answer-B
An external floating roof shall be provided with at least one manhole having a minimum
inside diameter of __________ inches.
(a) 18;
(b) 15;
(c) 24;
(d) 30. - Answer-C
A formal Visual External inspection by a qualified inspector shall be done atleast :-
(a) Every 5 years of ¼ CR life whichever is less
(b) Every 5 years of ½ CR life whichever is less
(c) Every 2 years
(d) Every 1- years or ¼ CR life whichever is greater - Answer-A
A full hydrostatic test (when required) shall be held for __________ hours :-
(a) 24;
(b) 8;
(c) 18;
(d) 12 - Answer-A
A full-fillet weld is a weld that :-
,(a) not less than 1/3 the thinner plate;
(b) the legs equal the thickness of the thinner plate;
(c) the largest isosceles triangle that can be inscribed within the cross section of the weld
(d) is atleast the thickness of the thicker plate - Answer-B
A hot tap in a 1.25" thick tank with a minimum metal temperature of 65oF at time of hot tap,
without having material toughness data is :-
(a) not permitted;
(b) permitted;
(c) not enough information;
(d) not addressed by the code - Answer-A
A hydrostatic test for a relocated tank :-
(a) may be waived by the Owner / Operator;
(b) is required;
(c) may be waived by the Inspector; (d) is not necessary - Answer-B
A liquid penetrant examiner must have vision to enable him to read Jagger Type 2 standard
chart at a distance of not less than 12 inches and is capable of distinguishing and
differentiating contrast between colours used. Examiners shall be checked __________ to
ensure that they meet these requirements :-
(a) Quarterly;
(b) Semi-Annually;
(c) Annually;
(d) Bi-Annually. - Answer-C
, A procedure qualification record (PQR) shall address :-
(a) non-essential variables;
(b) (b) essential variables;
(c) supplemental essential variables (when required);
(d) (d) both (b) and (c) - Answer-D
A radiograph is made using an X-ray source and two films in each film holder. For composite
viewing, each film of the composite shall have a minimum density of :-
(a) 4.0; (b) 1.8; (c) 2.0; (d) 1.3 - Answer-D
A reconstructed tank with a total height of 25' has been determined to have an out-ofplumbness
of 2-3/4". This is :-
(a) acceptable; (b) unacceptable;
(c) not covered by the code (d) corrected by eternal strengthening - Answer-A
A riveted tank shell with a butt joint has 3 rows. What is the joint efficiency ?
(a) 0.75"; (b) 0.85"; (c) 0.90; (d) 0.91. - Answer-B
A SAW welding operator is attempting to quality by radiography on a 6 inch thick test
coupon. Elongated slag inclusions are measured to be 0.2 inch long.
(a) Must weld 2 additional coupons; (b) meets the requirements (passes)
(c) slag must not exceed 0.5" (d) slag is not acceptable. - Answer-B
A self-supporting cone roof :-
