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Study SheetsBased on API 653 Exam Information

The following is a collection of questions remembered by various students who took the API 653Exam in the past.

This study sheet is designed to help a student prepare for the API 653 Exam. Read eachquestion carefully and select the best answer by circling your choice. After selection of your

answer, write in the section number and publication in which your answer was found. Look up eachquestion in the reference publications listed below; remember, this exercise is to help you to learnto use the reference material. Generally, the assignment is broken into several sections. Eachsection should take approximately one hour to complete. Answers will be discussed at thebeginning of class the following morning.

The answers will be found in the following reference publications:

API 650, Welded Steel Tanks for Oil Storage, Tenth Edition, November, 1998, includingAddendum 1 (January, 2000), Addendum 2 (November, 2001), and Addendum 3(September, 2003).

API RP 651, Cathodic Protection of Aboveground Petroleum Storage Tanks, SecondEdition, December, 1997

API RP 652, Lining of Above Ground Petroleum Storage Tank Bottoms, SecondEdition, December, 1997

API 653, Tank Inspection, Repair, Alteration and Reconstruction, Third Edition,December, 2001, including Addendum 1 (September, 2003).

API 2015, Safe Entry and Cleaning Petroleum Storage Tanks, Sixth Edition, August, 2001.API 2207, Preparing Tank Bottoms for Hot Work, Fifth Edition, September, 1998API RP 575, Inspection of Atmospheric and Low-Pressure Storage Tanks, First Edition,

November, 1995

ASME Boiler & Pressure Vessel Code, 2001 Edition, with 2002 and 2003 AddendaSection V, Nondestructive Examination, Articles 1, 2, 6, 7 and 23 (Section SE-797only)

Section IX, Welding and Brazing Qualifications

API 653 Exam Prep Homework Questions Page 1

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76. What is the P number for the tank as listed above?

a. 1.5b. 1

c. 6d. 24

Section: Reference Publication:

77. What is the maximum fill rate for the tank as listed above?

a. 3 feet per secondb. 6 feet per secondc. 3 feet per minuted. 6 feet per minute


78. What is the SFA number for E 7018 electrodes?

a. 5b 5.1c. 5.29d. 5.42


79. What is the filler number for E-7018 electrodes?

a. 1b. 2c. 3d. 4


80. What is the minimum acceptable shell plate thickness for the first course of T 3-27, if thespecific gravity of the stored product is 1.3? NOTE: current inspection (2003) based on

product alone, and full height operation.

a. .316b. .500c. .262d. Not enough information given



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81. What is the hydrostatic test height of T 3-27 if the joint efficiency is .85 and the specificgravity of the product is 1.3?

a. 57.24'b. 40'c. 28.27'd. Not enough information given


82. What is the minimum acceptable shell plate thickness for the top course of T 3-27 if eachcourse is 120" tall?

a. .1"

b. .062"c. .269"d. Not enough information given


83. What is the joint efficiency for T 3-27?

a. 1b. .85c. .70d. .35


84. What is the corrosion allowance for T 3-27?

a. .185"b. .125"c. .0625"d. Not enough information given


85. If T 3-27 was new, what would be the minimum first course thickness, based on productalone?

a. .269"b. .310"c. .500"d. Not enough information given



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86. How many settlement points are required for an external settlement of T 3-27?

a. 4b. 6c. 8d. 10


87. A depression in the floor is discovered near the east manway of T 3-27. The diameter ofthe depression is 96", the deepest point in the depression is 4". The area _________.

a. is rejectable.

b. is acceptable.c. must be monitored.d. can be filled in with epoxy and accepted.


88. During the internal inspection of T 3-27, a patch plate welded to the floor, with a tombstoneshaped pad, extending to the inside of the shell was discovered. The plate had beenseal welded to the floor and shell, with a minimum dimension of 12 inches. The inspectorshould _____________.

a. have the patch removed.b. inspect the patch.c. recommend removal of the patch and floor plates in the repaired area, replacing with

new floor plates.d. this repair is in the critical zone and not allowed.


89. During the same internal inspection of T 3-27, a square lap-welded patch was found overan existing nozzle. The inspector should __________.

a. have the patch removed.b. inspect the patch.c. cut out the entire shell plate.d. radiograph the patch for weld quality.



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90. T 3-27 has a hole, less than 1" in diameter, in the roof. Rain water does not contaminate thestored product. Is a repair required by API 653?

a. A repair may be made by using duct tape.b. Only if the owner requires the repair.c. Nod. Yes


91. What is the position designation for welding pipe in the horizontal fixed position?

a. 2Gb. 3Gc. 5Gd. 6G


92. During a fluorescent MT test, the black light intensity shall be measured at leastonce every .

a. hourb. 2 hoursc. 4 hoursd. 8 hours


93. Terminology for weld metal in excess of the specified weld size.

a. Weld reinforcementb. Good weld techniquec. Weld toed. Weld throat


94. If T 3-27 had a new nozzle installed in the third course, north side, could the shell-to-nozzleweld be made using the oxyfuel welding process, if impact testing is not required?

a. Yesb. Noc. The oxyfuel process is not allowed by ASME Section IXd. Nozzle welds must be made using SMAW only



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95. A diesel oil test is required for ______________.

a. all new nozzle weldsb. all new floor weldsc. all new shell welds

d. all new shell-to-bottom welds


96. The minimum PSIG for a vacuum box test is __________.

a. 1 PSIGb. 2 PSIGc. 3 PSIGd. 4 PSIG


97. A pipe welder is qualified to API 1104 only. What welds can he make on the tank if heis qualified in the 6G position?

a. Nozzle Weldsb. Shell Weldsc. Floor and roof fillet weldsd. None


98. A procedure is qualified on plate .500" thick. Which of the following thicknesses is notqualified?

a. 1"b. 1/2"c. 1/4"d. 1/8"


99. A procedure is qualified on plate .500" thick. Four nick break specimens were substituted

for the four side bends.a. The procedure is qualified.b. ASME does not allow nick breaks.c. Two tension specimens were required.d. Nick breaks are used only on pipe.



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100. A welder is qualified in the 3F and 4F positions. Which of the following groove welds canhe make?

a. 1Gb. 2Gc. 6Gd. None



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