API 653 exam prep - Open Book ONLY
*When using the preheat alternative weld method, the temperature shall be checked ___ to
assure the minimum temperature is maintained during welding.
A) one inch or two times the material thickness whichever is greater, on each side of the
groove.
B) two inches or two times the material thickness, whichever is great, on each side of the
groove
C) Three inches or three times the material thickness, whichever is greater, in each side of
the groove
D) Four inches or four times the material thickness whichever is greater on each side of the
groove - correct answer-D
*For a roof to be considered as frangible:
A) the top angle shall be larger than 2 X 2 3/16 in
B) the top angle attachments weld shall me a minimum of 3/16"
C) The roof support members shall not be attached tot he roof plate
D) the roof support members shall be attached to the roof plate - correct answer-C
*What are the examiner qualification for visual examination for tank inspection?
A) Shall comply with ASME Sect V, article 9
B) Shall have visual capable of reading a standard Jaeger J-1 chart
C) Shall have biennial visual examination by a license optometrist
D) There are no requirements - correct answer-D
*Sulfuric acid corrosion can be inspected and monitored with:
A) Shear wave ultrasonic testing
B) Visual Inspection
C) Coupons and ER probes
D) Wet fluorescent magnetic particle testing - correct answer-C
*What is the maximum interpass temperature permitted, in API 653, when using the preheat
alternative to PWHT welding method?
A) 600°F
B) 450°F
C) 300°F
D) 800°F - correct answer-A
*Radiographic examinations are required for all of the following except:
A) New and replaced shell insert plate and door sheet welds
B) All repairs to butt-welds that are examined ultrasonically
C) New annular plate joints
D) Shell Butt-welds on reconstructed tanks - correct answer-B
,*For tanks constructed of material having a yield strength equal to or less than _____, it may
not be necessary to raise all nozzles, when installing a new bottom in an existing tank, if
certain conditions are met.
A) 70000 psi
B) 60000 psi
C) 50000 psi
D) 40000 psi - correct answer-C
*A tank, built to the ninth edition of API 650, is to have a new bottom installed. The
installation will be performed by slotting the shell and inserting the new bottom. The shell
plate material is A-516 Gr. 60 and the new shell to bottom weld will be made using
low-hydrogen electrodes. An existing NP2 12 reinforced shell penetration does not meet the
minimum weld spacing requirements of the current API 650 edition. There is 5-1/2 inches
between the toe of the shell to bottom weld and the toe of reinforcing plate fillet weld. The
inspector should:
A) Order the penetration raised to comply with the current API 650 weld spacing
requirements
B) Order the penetration raised to obtain a minimum of 6 inches between the toe of the shell
to bottom weld and the toe of reinforcing plate fillet weld.
C) Accept the penetration provided the penetration weld and the shell to bottom weld are
blend ground and examined by the appropr - correct answer-C
*Permanent attachment welds, made on A-516 Gr. 60 plate shall be examined by which of
the following methods?
A) Magnetic particle
B) Liquid Penetrant
C) Either Magnetic particle or liquid penetrant
D) Visual - correct answer-D
*During an inspection, an inspector finds lap-welded patch on a tank shell. Some patches
are thinner than 0.500" and others are thicker than 0.500". No patch plate is thinner that
0.1875". What should the inspector do?
A) All patches thicker than 0.50" must be removed and repairs made in accordance with API
653
B) Consult with engineer experienced in tank design
C) all existing welded on patch plates are acceptable provided they meet the size and
location requirements of API 653
D) All of the existing patch plates must be removed and repairs made in accordance with
API 653 - correct answer-C
*in regards to seismic design, reconstructed tanks:
A) shall meet the stability requirments of the current applicable standards
B) Require the anchoring of the tank even if not used on the original tank
C) Require the installation of thickened bottom plates under the bottom shell course of not
existing
D) Shall meet the stability requirments of the "as-built" standard - correct answer-A
*New welds (Not repair welds) on tank bottom plates should be examined:
, A) By vacuum box and tracer gas
B) By magnetic particle and visual
C) By visual only
D) By visual and vacuum box - correct answer-D
*API 653 requires the perimeter welds on the welded on patches on the critical zone be:
A) Two-pass and examined by visually and by MT or PT
B) Welded on pathc plats are not permitted for repairs in the critical Zone
C) Single pass and examined visually and by MT or PT
D) Single pass and examined visually and by vacuum box test - correct answer-A
*The inspector finds a thin area in the shell of a 150 ft. diameter riveted tank. The maximum
horizontal dimension of the thin area in four inches and the maximum vertical dimension is
one inch. The nearest edge of the thin area is twelve inche from a vertical seam and fifteen
inches from horizontal seam. it is decided to make the repair using a weld-on lap patch.
Which is the minimum repair plate dimension?
A) A lap patch is not permitted on a riveted shell
B) Four inches
C) Two inches
D) Six inches - correct answer-B
*New lap welded shell patch plate attachment welds shall be examined by which of the
following?
A) Visually and by MT or PT
B) MT or PT only
C) Vacuum box and solution film
D) Visually only - correct answer-A
*A locally thinned area is found in a 10 year old tank. The thinned area is located near a
weld in the third shell course from the bottom; 20 feet below the maximum liquid level. The
tank was built to API 650 eighth edition requirments with RT done as required by the basic
standard. The tank is 200 feet in diameter and 40 feet high. The RN specific gravity of the
product stored in the tank is 0.86. The tank material allowable stress is 33,000 psi. The joint
efficiency is 1.0. What minimum thickness is required?
A) 0.257 inches
B) 0.298 inches
C) 0.319 inches
D) 0.271 inches - correct answer-D
*It may not be necessary to raise all nozzles, when installing a new bottom in an existing
tank, if certain conditions are met. Blend grinding of existing welds and examination are
among these requirements. Of the following, which is not a requirements for the welds of
nozzles that are not to be raised?
A) For circular reinforcements plates, blend grind the attachment weld from the four o'clock
to the eight o'clock position
B) For diamond shaped reinforcement plates, blend grind the inside and outside of the shell
to bottom weld a minimum distance of one penetration diameter length on either side of the
penetration centerline
*When using the preheat alternative weld method, the temperature shall be checked ___ to
assure the minimum temperature is maintained during welding.
A) one inch or two times the material thickness whichever is greater, on each side of the
groove.
B) two inches or two times the material thickness, whichever is great, on each side of the
groove
C) Three inches or three times the material thickness, whichever is greater, in each side of
the groove
D) Four inches or four times the material thickness whichever is greater on each side of the
groove - correct answer-D
*For a roof to be considered as frangible:
A) the top angle shall be larger than 2 X 2 3/16 in
B) the top angle attachments weld shall me a minimum of 3/16"
C) The roof support members shall not be attached tot he roof plate
D) the roof support members shall be attached to the roof plate - correct answer-C
*What are the examiner qualification for visual examination for tank inspection?
A) Shall comply with ASME Sect V, article 9
B) Shall have visual capable of reading a standard Jaeger J-1 chart
C) Shall have biennial visual examination by a license optometrist
D) There are no requirements - correct answer-D
*Sulfuric acid corrosion can be inspected and monitored with:
A) Shear wave ultrasonic testing
B) Visual Inspection
C) Coupons and ER probes
D) Wet fluorescent magnetic particle testing - correct answer-C
*What is the maximum interpass temperature permitted, in API 653, when using the preheat
alternative to PWHT welding method?
A) 600°F
B) 450°F
C) 300°F
D) 800°F - correct answer-A
*Radiographic examinations are required for all of the following except:
A) New and replaced shell insert plate and door sheet welds
B) All repairs to butt-welds that are examined ultrasonically
C) New annular plate joints
D) Shell Butt-welds on reconstructed tanks - correct answer-B
,*For tanks constructed of material having a yield strength equal to or less than _____, it may
not be necessary to raise all nozzles, when installing a new bottom in an existing tank, if
certain conditions are met.
A) 70000 psi
B) 60000 psi
C) 50000 psi
D) 40000 psi - correct answer-C
*A tank, built to the ninth edition of API 650, is to have a new bottom installed. The
installation will be performed by slotting the shell and inserting the new bottom. The shell
plate material is A-516 Gr. 60 and the new shell to bottom weld will be made using
low-hydrogen electrodes. An existing NP2 12 reinforced shell penetration does not meet the
minimum weld spacing requirements of the current API 650 edition. There is 5-1/2 inches
between the toe of the shell to bottom weld and the toe of reinforcing plate fillet weld. The
inspector should:
A) Order the penetration raised to comply with the current API 650 weld spacing
requirements
B) Order the penetration raised to obtain a minimum of 6 inches between the toe of the shell
to bottom weld and the toe of reinforcing plate fillet weld.
C) Accept the penetration provided the penetration weld and the shell to bottom weld are
blend ground and examined by the appropr - correct answer-C
*Permanent attachment welds, made on A-516 Gr. 60 plate shall be examined by which of
the following methods?
A) Magnetic particle
B) Liquid Penetrant
C) Either Magnetic particle or liquid penetrant
D) Visual - correct answer-D
*During an inspection, an inspector finds lap-welded patch on a tank shell. Some patches
are thinner than 0.500" and others are thicker than 0.500". No patch plate is thinner that
0.1875". What should the inspector do?
A) All patches thicker than 0.50" must be removed and repairs made in accordance with API
653
B) Consult with engineer experienced in tank design
C) all existing welded on patch plates are acceptable provided they meet the size and
location requirements of API 653
D) All of the existing patch plates must be removed and repairs made in accordance with
API 653 - correct answer-C
*in regards to seismic design, reconstructed tanks:
A) shall meet the stability requirments of the current applicable standards
B) Require the anchoring of the tank even if not used on the original tank
C) Require the installation of thickened bottom plates under the bottom shell course of not
existing
D) Shall meet the stability requirments of the "as-built" standard - correct answer-A
*New welds (Not repair welds) on tank bottom plates should be examined:
, A) By vacuum box and tracer gas
B) By magnetic particle and visual
C) By visual only
D) By visual and vacuum box - correct answer-D
*API 653 requires the perimeter welds on the welded on patches on the critical zone be:
A) Two-pass and examined by visually and by MT or PT
B) Welded on pathc plats are not permitted for repairs in the critical Zone
C) Single pass and examined visually and by MT or PT
D) Single pass and examined visually and by vacuum box test - correct answer-A
*The inspector finds a thin area in the shell of a 150 ft. diameter riveted tank. The maximum
horizontal dimension of the thin area in four inches and the maximum vertical dimension is
one inch. The nearest edge of the thin area is twelve inche from a vertical seam and fifteen
inches from horizontal seam. it is decided to make the repair using a weld-on lap patch.
Which is the minimum repair plate dimension?
A) A lap patch is not permitted on a riveted shell
B) Four inches
C) Two inches
D) Six inches - correct answer-B
*New lap welded shell patch plate attachment welds shall be examined by which of the
following?
A) Visually and by MT or PT
B) MT or PT only
C) Vacuum box and solution film
D) Visually only - correct answer-A
*A locally thinned area is found in a 10 year old tank. The thinned area is located near a
weld in the third shell course from the bottom; 20 feet below the maximum liquid level. The
tank was built to API 650 eighth edition requirments with RT done as required by the basic
standard. The tank is 200 feet in diameter and 40 feet high. The RN specific gravity of the
product stored in the tank is 0.86. The tank material allowable stress is 33,000 psi. The joint
efficiency is 1.0. What minimum thickness is required?
A) 0.257 inches
B) 0.298 inches
C) 0.319 inches
D) 0.271 inches - correct answer-D
*It may not be necessary to raise all nozzles, when installing a new bottom in an existing
tank, if certain conditions are met. Blend grinding of existing welds and examination are
among these requirements. Of the following, which is not a requirements for the welds of
nozzles that are not to be raised?
A) For circular reinforcements plates, blend grind the attachment weld from the four o'clock
to the eight o'clock position
B) For diamond shaped reinforcement plates, blend grind the inside and outside of the shell
to bottom weld a minimum distance of one penetration diameter length on either side of the
penetration centerline
