API 653 Exam Prep Open Book 2024 Questions & Answers 100% Correct Verified
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*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 thicknes...
API 653 Exam Prep - Open Book 2024
Questions & Answers | 100% Correct |
Verified
*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 -
✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔D
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