API 575 Section 5 Flashcards
Regulatory requirements typically cover safety & environmental concerns. Some jurisdictions require what is called “RAGAGEP”. RAGAGEP stands for:
A. Recognized And Generally Accepted Good Engineering Practice.
B. Rules And Guidelines Adopted by Governmental Enhanced Politics.
C. Requirements Accepted, Governed, Adopted by Geographic Engineering Professionals.
D. Run And Gun As Guided by Exceptional Performance.
A. Recognized And Generally Accepted Good Engineering Practice. (5.1.4.1)
Which of the following codes is not a tank inspection code?
A. API RP 12R1
B. API 653
C. STI SP001
D. UL-142
D. UL-142 (5.1.4.3)
A tank pad is installed with cinders. What chemical in the cinders can cause bottom-side corrosion when the pad gets wet?
A. Chlorides
B. Iron
C. Kryptonite
D. Silicon
E. Sulfur
E. Sulfur (5.2.2.2)
Which is not a common cause of bottom-side corrosion on a tank floor?
A. Clay or wood left in sand pad B. Improperly sealed ring wall C. Leaking product that is corrosive
D. Operating temperatures below 200 °F
E. Poor drainage in tank area
D. Operating temperatures below 200 °F (5.2.2.2)
A few clay balls are in a tank’s sand pad. Which of the following is true about bottom-side corrosion?
A. Corrosion will occur near the clay ball
B. Corrosion will occur under the clay ball
C. The clay ball forms a tight seal and prevents corrosion
D. Adjacent clay balls form a galvanic cell
B. Corrosion will occur under the clay ball (5.2.2.2)
In order to prevent future bottom-side corrosion, which is not recommended during the construction of a tank?
A. Asphalt-impregnated fiberboard between ring-wall and tank bottom
B. During pad installation, assure pad materials are clean and salt free
C. Install sand pad using specified ASTM materials that is 3-4” thick
D. Install tank foundation 12” above the tank dike grade
A. Asphalt-impregnated fiberboard between ring-wall and tank bottom (5.2.2.2)
Which of the following often causes external corrosion at the bottom of the lower shell course? This may have more than one correct answer, select all answers that apply.
A. CUI
B. Shell covered with crude that leaked when tank was overfilled
C. Tank that has settled and the tank grade is higher than the tank bottom
D. Tank that has experienced cracks in the tank’s ring-wall
A. CUI, C. Tank that has settled and the tank grade is higher than the tank bottom (5.2.2.2/3)
Concentration cell corrosion may occur in the many niches of:
A. cone roof tanks.
B. internal floating roof tanks. C. low-pressure tanks.
D. riveted tanks
D. riveted tanks (5.2.2.4)
Which document helps the inspector understand corrosion mechanisms?
A. API 571
B. ASME PCC-2
C. ASTM SA-333
D. NACE 1089
A. API 571 (5.2.3.1)
Most tanks storing petroleum product are made from which metallurgy(s)?
A. Carbon steel
B. Chromes
C. Carbon steel or chromes
D. Kryptonite
E. Austenitic stainless steel
A. Carbon steel (5.2.3.2)
Which of the following is a common cause of corrosion in a tank’s vapor space? This may have more than one correct answer, select all answers that apply.
A. Hydrogen sulfide vapor
B. Oxygen
C. Nitrogen
D. Water vapor
A. Hydrogen sulfide vapor, B. Oxygen, D. Water vapor (5.2.3.2)
Generally, in the liquid portion of a tank, internal corrosion is worse at the:
A. bottom of the tank.
B. heat affect zones in shell horizontal welds.
C. nozzles.
D. welds.
A. bottom of the tank. (5.2.3.2)
Which of the following tank products does not cause stress corrosion cracking?
A. Benzene
B. Caustic
C. DEA
D. Ethanol
A. Benzene (5.2.3.2)
Occasionally a tank will be built with alloy materials. Which of the following is a common reason for selecting alloys to build a tank?
A. High design temperature
B. Increased strength
C. Lower cost
D. Maintain product purity
D. Maintain product purity (5.3.4)
Stress corrosion cracking of austenitic SS can occur in the presence of:
A. acids.
B. chlorides.
C. hydrocarbons.
D. sulfides
B. chlorides. (5.3.4)