API 571

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SamG
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API 571
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2014-03-14 09:45:33
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API 653 Exam Prep
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  1. What does "L" mean in Austenitic SS, Like 304 L?
    a) Has a low carbon content
    b) Has a low chrome content
    c) Has a low nickel level
    d) has a low toughness level
    a) Has a low carbon content
  2. What does "H" mean in Austenitic SS, Like 304 H?
    a) Has a high carbon content
    b) Has a high chrome content
    c) Has a high nickel level
    d) has a high toughness level
    a) Has a high carbon content
  3. which of the following is NOT a ferritic steel?
    a) 300 Series SS
    b) 400 Series SS
    c) Chromes
    d) Carbon Steel
    e) None of the above
    a) 300 Series SS
  4. Low alloy steels can contain up to:
    a) 5% chrome
    b) 9% chrome
    c) 12% chrome
    d) 18% chrome
    e) None of the above
    b) 9% chrome
  5. Which of the following is an Austenitic SS?
    a) Type 316
    b) Type 2205
    c) Type 405
    d) Type 410
    a) Type 316
  6. Which of the following is an Ferritic SS?
    a) Type 316
    b) Type 2205
    c) Type 405
    d) Type 410
    c) Type 405
  7. Which of the following is an Martensitic SS?
    a) Type 316
    b) Type 2205
    c) Type 405
    d) Type 410
    d) Type 410
  8. Nickel alloys are materials that have over:
    a) 18% nickel
    b) 25% nickel
    c) 30% nickel
    d) 50% nickel
    c) 30% nickel
  9. A Brittle Fracture:
    a) is caused by stress cycles
    b) is always the result of thermal stresses
    c) grows very rapidly with minimum deformation prior to failure
    d) grows slowly and is dependent on time and stress
    c) grows very rapidly with minimum deformation prior to failure
  10. Which of the following materials is least affected by Brittle fracture?
    a) Carbon Steel
    b) Chromes
    c) 300 series SS
    d) 400 series SS
    e) All stainless steels
    c) 300 series SS
  11. Which of the following is NOT a critical factor that contributes to a Brittle Fracture?
    a) the materials fracture toughness
    b) Maximum operating temperature
    c) Stress concentration at a flow
    d) Magnitude of the residual stresses
    b) Maximum operating temperature
  12. Resistance to Brittle Fracture is called:
    a) charpy
    b) embossment
    c) strength
    d) toughness
    d) toughness
  13. Which of the following increases the likelihood of Brittle Fracture?
    a) Larger grain size
    b) operational temperatures above 800F
    c) Steels less than 1/4" thick
    d) the addition of nickel in the material
    a) Larger grain size
  14. Which of the following increases the likelihood of Brittle Fracture?
    a) Smaller grain size
    b) Operating above transitional temperature
    c) thicker materials
    d) the addition of nickel
    c) thicker materials
  15. What test is used to determine ta materials toughness?
    a) Charpy impact test
    b) Guided bend test
    c) Metallography
    d) Tension Test
    e) Physical fitness test
    a) Charpy impact test
  16. Most Brittle failures occur:
    a) below the impact transition temperature
    b) on thinner materials
    c) on "clean" steel
    d) while in operation at elevated temperatures
    a) below the impact transition temperature
  17. ASME Section VIII had few limitations concerning Brittle Fracture prior to:
    a) 1955
    b) 1962
    c) 1973
    d) 1987
    d) 1987
  18. A 4" thick 5 Chrome vessel operates at 1200 psig and 900F.  When is this vessel least likely to fail by brittle fracture?
    a) Hydrotesting
    b) Normal operation
    c) Shutting down the unit
    d) Starting up the unit
    b) Normal operation
  19. Most Brittle fracture appear as"
    a) branched cracking
    b) intergranular cracking
    c) ductile tears
    d) cleveage
    d) cleveage
  20. Which of the following is not a method used to prevent Brittle Fracture?
    a) Thorough inspections
    b) Strict controls on selecting construction materials
    c) Post weld heat treatment
    d) Controlled minimum operating temperatures.
    a) Thorough inspections
  21. Mechanical Fatigue is caused by:
    a) Cyclic stresses occurring over a long period of time
    b) Higher than average stresses at high temperatures
    c) constant stresses occurring at low temperatures
    d) cyclic operating condition of bird poop then rain, bird poop then rain, etc.
    a) Cyclic stresses occurring over a long period of time
  22. Which of the following materials are affected by Mechanical Fatigue?
    a) Only Carbon Steel
    b) Only Carbon Steel and chromes
    c) Only Carbon Steel, and high nickel alloys
    d) All materials
    d) All materials
  23. Fatigue will not occur in carbon steel is stress are below the:
    a) transition limit
    b) endurance limit
    c) hardening limit
    d) speed limit
    b) endurance limit
  24. Which condition contributes to Mechanical Fatigue - temperature:
    a) Low temp
    b) High temp
    c) Not a Factor
    c) Not a Factor
  25. Which condition contributes to Mechanical Fatigue - Steel Properties:
    a) Dirty Steel
    b) Clean Steel
    c) Not a Factor
    a) Dirty Steel
  26. Which condition contributes to Mechanical Fatigue - Grain Structure:
    a) Fine-grain
    b) Coarse-grain
    c) Not a Factor
    b) Coarse-grain
  27. Which condition contributes to Mechanical Fatigue - Surface Condition:
    a) Notches
    b) Smooth surfaces
    c) Not a Factor
    a) Notches
  28. Which condition contributes to Mechanical Fatigue - Process pH:
    a) High pH
    b) Low pH
    c) Not a Factor
    c) Not a Factor
  29. The endurance limit is usually about:
    a) 10-20% of a materials ultimate tensile strength
    b) 40-50% of a materials ultimate tensile strength
    c) 10-20% of a materials yield strength
    d) 40-50% of a materials yield strength
    b) 40-50% of a materials ultimate tensile strength
  30. Which material does not have an endurance limit?
    a) Non-normalized carbon steel
    b) normalized carbon steel
    c) Stainless steel
    d) Titanium
    c) Stainless steel
  31. Mechanical Fatigue can cause cracks that initiate from the surface and often form a:
    a) clam shell appearance
    b) snail shell appearance
    c) turtle shell appearance
    d) shell oil shell appearance
    a) clam shell appearance
  32. The best defense against mechanical fatigue is a:
    a) fantastic inspection program
    b) good design that minimizes stress concentrations
    c) shutting down the plant to eliminate stress cycles
    d) good offense
    e) streak of good luck
    b) good design that minimizes stress concentrations
  33. Inspecting for high cycle fatigue can be difficult since:
    a) the cracks are extremely tight
    b) predicting the location of cracking is difficult
    c) once the cracks begins, only a few cycles are needed for the crack to lead to failure
    d) often the equipment is vibrating making non-destructive evaluation difficult.
    c) once the cracks begins, only a few cycles are needed for the crack to lead to failure
  34. Atmospheric corrosion is of greatest concern in:
    a) dry climates in rural locations
    b) dry climates in industrial locations
    c) wet climates in rural locations
    d) wet climates in industrial locations
    d) wet climates in industrial locations
  35. Which of the following martials is least affected by Atmospheric corrosion?
    a) Carbon steel
    b) Chromes
    c) Stainless steels
    d) Copper alloyed with aluminum
    c) Stainless steels
  36. List the approximate corrosion rate from Atmospheric corrosion based on the following conditions.
    a) dry rural environment    _____mpy
    b) Inland locations with moderate humidity or rainfall ____mpy
    c) Industrial environment with airborne acids/ sulfur compounds ___mpy
    d) Marine environments ______ mpy
    • a) <1mpy
    • b) 1-3 mpy
    • c) 5-10 mpy
    • d) 20mpy
  37. which of the following does not increase the likelihood of atmospheric corrosion?
    a) Bird poop
    b) Increasing annual rainfalls
    c) locations where moisture is trapped
    d) Increasing operating pressures
    e) Increasing amounts of airborne contaminants
    d) Increasing operating pressures
  38. A key place for Atmospheric Corrosion is:
    a) on piping systems that operate above 250F
    b) where piping rests on pipe supports
    c) on the top side of an uncoated pipe
    d) on uninsulated and uncoated vessels in Arizona
    b) where piping rests on pipe supports
  39. Atmospheric Corrosion:
    a) can cause either uniform of localized wall loss
    b) always causes localized wall loss
    c) always causes uniform wall los
    d) is best detected using profile RT
    a) can cause either uniform of localized wall loss
  40. The best way to prevent failures by Atmospheric Corrosion is to:
    a) have an aggressive inspection program
    b) reduce airborne particles
    c) install and maintain appropriate coatings
    d) shoot all birds that cross the plant fence
    e) build new petrochemical facilities in a dry desert.
    c) install and maintain appropriate coatings
  41. Cui is an inspection concern for insulated carbon steel equipment that operates between:
    a) 0 to 100F
    b) 10 to 350F
    c) 25 to 250F
    d) 50 to 125F
    e) 140 to 400F
    b) 10 to 350F
  42. Cui is an inspection concern for insulated vessel that operated at 500F and:
    a) is in intermittent service
    b) is made of stainless steel
    c) is made of low chromes
    d) have poorly maintained insulation
    a) is in intermittent service
  43. Which of the following insulated equipment is most likely to experience CUI?
    a) CS vessel operating at 600F but in an intermittent service
    b) CS vessel operates continuously at 375F
    c) CS vessel operates continuously at -20F
    d) CS vessel operates at cyclic temp between 375-600F
    e) SS vessel that operates continuously at 100F
    a) CS vessel operating at 600F but in an intermittent service
  44. Which of the following insulated equipment is most likely to experience CUI?
    a) CS vessel operating at 600F but in an intermittent service
    b) CS vessel operates continuously at 375F
    c) CS vessel operates continuously at -20F
    d) CS vessel operates at cyclic temp between 375-600F
    e) SS vessel that operates continuously at 100F
    a) CS vessel operating at 600F but in an intermittent service
  45. CUI is most severe when metal temps are between
    a) 10 to 350F
    b) 25 to 250F
    c) 212 to 350F
    d) 140 to 400F
    c) 212 to 350F
  46. If the metal temp increases, while still in the CUI temp range, the corrosion rate:
    a) will decrease
    b) will increase
    c) will remain constant
    d) may increase of decrease depending on the operation process
    b) will increase
  47. Which of the following is not a common location of CUI on piping?
    a) bolted on pipe shoes
    b) First few feet of horizontal pipe attached to a bottom of a vertical pipe run.
    c) Insulation terminations
    d) Piping spec breaks
    e) Steam tracing tubing penetrations
    d) Piping spec breaks
  48. CUI on carbon steel or low alloy materials appears as:
    a) Cracking
    b) general wall loss
    c) localized wall loss
    d) localized pitting or localized wall loss
    d) localized pitting or localized wall loss
  49. CUI on 300 Series stainless steel appears as:
    a) Cracking
    b) general wall loss
    c) localized wall loss
    d) localized pitting or localized wall loss
    e) cracking or localized pitting or localized wall loss.
    d) localized pitting or localized wall loss
  50. CUI on 300 Series stainless steel appears as:
    a) Cracking
    b) general wall loss
    c) localized wall loss
    d) localized pitting or localized wall loss
    e) cracking or localized pitting or localized wall loss.
    e) cracking or localized pitting or localized wall loss.
  51. What caused the CUI cracking on 300 series stainless steel materials?
    a) Chlorides
    b) Hydrogen
    c) Nitrates
    d) Sulfates
    e) Kryptonite
    a) Chlorides
  52. Which of the following is not a method to prevent CUI?
    a) Flame sprayed aluminum coatings
    b) non-metallic coating
    c) use of closed cell foam glass insulations
    d) Wishful thinking
    d) Wishful thinking
  53. Which of the following is not a method to inspect for CUI?
    a) De-insulate and visual inspection
    b) Guided wave UT
    c) MFL
    d) Neutron backscatter
    e) Real-time profile RT
    c) MFL
  54. Microbiologically Induced Corrosion is caused by:
    a) activated hydrocarbons
    b) deposits of sediment
    c) living organisms
    d) reaction of acids and caustics
    c) living organisms
  55. Which of the following materials is not subject to Microbiologically Induced Corrosion?
    a) 300 Series SS
    b) Aluminum
    c) Carbon Steel
    d) Chromes
    e) Copper
    f) Titanium
    f) Titanium
  56. Which of the following substances is normally required in order to MIC to occur?
    a) Chlorides
    b) Hydrogen
    c) Sulfur
    d) Water
    d) Water
  57. When MIC occurs, which of the following substances is not required?
    a) Carbon
    b) Iron
    c) Nitrogen
    d) Phosphorous
    b) Iron
  58. There are different types of organisms that cause MIC.  Which of the following is used as a nutrient for some MC organisms?
    a) Ammonia
    b) Ferrite
    c) Hydrogen
    d) Polytheonic acid
    a) Ammonia
  59. There are different types of organisms that cause MIC.  Which of the following is used as a nutrient for some MIC organisms?
    a) Chlorides
    b) Chrome
    c) Pearlite
    d) Sulfur
    d) Sulfur
  60. Which of the following is not a common place where MIC can occur?
    a) Furnace convection section
    b) Heat exchangers
    c) Piping with high fluid velocities
    d) underside of tank roofs
    a) Furnace convection section
  61. Which of the following is a common place where MIC can occur?
    a) Furnace Stacks
    b) Piping with untrained hydrotest water
    c) Piping with high fluid velocities
    d) underside of tank roofs
    b) Piping with undrained hydrotest water
  62. MIC occurring in carbon steel usually forms:
    a) cup shaped pits
    b) cone shaped pits
    c) cracks
    d) general wall loss
    a) cup shaped pits
  63. MIC occurring in 300 series stainless steel usually forms:
    a) cup shaped pits
    b) cone shaped pits
    c) sub-surface cavities
    d) uniform wall loss
    c) sub-surface cavities
  64. To prevent MIC equipment and piping having water should be treated with:
    a) biocides
    b) hydrocides
    c) pesticides
    d) sulfides
    a) biocides
  65. Which of the following is not a MIC biocide?
    a) Bromine
    b) Chloride
    c) Milk of Magnesia
    d) Ozone
    e) Ultraviolet Light
    c) Milk of Magnesia
  66. Which of the following may be an indication that MIC is occurring?
    a) Bubbles in water
    b) Grayish water
    c) Stinky water
    d) Yellow water
    c) Stinky water
  67. Which of the following materials are subject to Soil Corrosion?
    a) Carbon Steel and Irons
    b) Carbon Steel and Chromes
    c) Carbon Steel, Chromes and 300 Series Stainless Steel
    d) Chromes and Irons
    e) Nickel Alloys
    a) Carbon Steel and Irons
  68. Which of the following is not a factor pertaining to Soil Corrosion?
    a) % Carbon content of steel
    b) Moisture
    c) Oxygen Content
    d) Soil resistivity
    e) Temperature
    a) % Carbon content of steel
  69. Soil Corrosion occurs most often at the soil-to-air interface because of the:
    a) higher oxygen content in the soil
    b) lower oxygen content in the soil
    c) higher moisture content in the soil
    d) lower moisture content in the soil
    e) higher oxygen and moisture content in the soil
    f) lower oxygen and moisture content in the soil
    e) higher oxygen and moisture content in the soil
  70. The corrosion rates from Soil Corrosion will:
    a) decrease with increasing temperature
    b) increase with increasing temperature
    c) not be affected by changing temperature
    d) increase if Mars & Venus are both aligned on the same day
    b) increase with increasing temperature
  71. Soil Corrosion appears as:
    a) Cracking
    b) isolated pitting
    c) localized loss due to pitting
    d) uniform wall loss
    c) localized loss due to pitting
  72. The most effective way to prevent Soil Corrosion is:
    a) to never have metal that touches the soil.
    b) coat the equipment/ piping
    c) coat the equipment/ piping and add a cathodic protection system
    d) replace the component in contact with the soil every 5 years
    c) coat the equipment/ piping and add a cathodic protection system
  73. Which of the following materials is not subject to Caustic Corrosion?
    a) Carbon Steel
    b) Chromes
    c) 300 Series SS
    d) Nickel Alloys
    d) Nickel Alloys
  74. Which of the following is the most significant factor affecting Caustic Corrosion?
    a) Presence of Caustic
    b) Gravitation pull of the Moon
    c) The relative value of the Operating Unit
    d) The number of Corrosion Specialists that you can fit in VW Bug
    a) Presence of Caustic
  75. Which of the following is not a usage of Caustic in the petrochemical industry?
    a) Added to Boiler Feed water in small amounts
    b) Used to decrease pH
    c) Used to Neutralize
    d) Used as a Reactant
    e) Used to remove Sulfur Compounds
    b) Used to decrease pH
  76. In order for Caustic Corrosion to occur in routine equipment there must be a:
    a) process temperature that exceeds 500F
    b) long period of time
    c) concentrating method to build the Caustic's strength
    d) unit upset that provides high strength Caustic
    c) concentrating method to build the Caustic's strength
  77. Caustic Corrosion is most often associated with:
    a) boilers and steam generating equipment
    b) furnaces
    c) overhead systems
    d) tank bottoms
    a) boilers and steam generating equipment
  78. Caustic Corrosion normally appears as:
    a) isolated pitting
    b) concentrated pitting
    c) localized metal loss often with grooving
    d) uniform metal loss
    c) localized metal loss often with grooving
  79. Caustic Corrosion starts to cause uniform corrosion of Carbon Steel when the process temperature exceeds:
    a) 140F
    b) 175F
    c) 225F
    d) 500F
    b) 175F
  80. In stream systems, Caustic Corrosion is best prevented by:
    a) aggressive monitoring
    b) the constant addition of an acid to neutralize the caustic
    c) thorough inspection program
    d) proper design
    d) proper design
  81. What material should be used with high strength Caustic solutions when the process temperature is above 150F?
    a) High Chrome alloys
    b) High nickel alloys
    c) high molybdenum alloys
    d) high kryptonite alloys
    b) High nickel alloys
  82. Chloride Stress corrosion cracking can cause cracks that normally initiate:
    a) on the surface of any material
    b) at the mid-wall of any material
    c) on the surface of 300 Series SS
    d) at the mid-wall of 300 Series SS
    d) at the mid-wall of 300 Series SS
  83. Which of the following is not a factor in the Chloride Stress Corrosion Cracking?
    a) Chloride Strength
    b) Material
    c) Stress
    d) Pressure
    e) Temperature
    d) Pressure
  84. Which of the following can contribute to Chloride Stress Corrosion Cracking?
    a) dissolved hydrogen
    b) dissolved oxygen
    c) dissolved nitrogen
    d) dissolved sulfide
    b) dissolved oxygen
  85. Heat transfer equipment can provide a way for chlorides to:
    a) break down
    b) concentrate
    c) react with sulfides
    d) vaporize
    b) concentrate
  86. Chloride Stress Corrosion Cracking usually occurs at a pH:
    a) above 2
    b) below 2
    c) above 7
    d) below 7
    a) above 2
  87. Chloride Stress Corrosion Cracking usually occurs at temperatures above:
    a) 10F
    b) 140F
    c) 180F
    d) 225F
    b) 140F
  88. Nickel alloys have the greatest susceptibility of Chloride Stress Corrosion Cracking when the nickel content is:
    a) less than 5%
    b) between 2.25% to 12%
    c) between 8% to 12%
    d) between 8% to 18%
    e) above 35%
    c) between 8% to 12%
  89. Nickel is highly resistant to Chloride Stress Corrosion Cracking when the nickel content in the alloy is above:
    a) 8%
    b) 12%
    c) 18%
    d) 25%
    e) 35%
    e) 35%
  90. External Chloride Stress Corrosion Cracking has been caused by chlorides in:
    a) insulation
    b) paint
    c) steam vapor
    d) UT couplant
    a) insulation
  91. Caustic Embrittlement can cause cracks that normally initiate:
    a) on the surface adjacent to welds
    b) at the mid-wall adjacent to welds
    c) on the surface in the base metal
    d) at the mid-wall in the base metal
    a) on the surface adjacent to welds
  92. Which alloys are more resistant to Caustic Stress Corrosion Cracking?
    a) Chromes
    b) Ferrites
    c) Nickels
    d) Sulfides
    c) Nickels
  93. In a caustic system, which of the following if improperly designed can contribute to Caustic Stress Corrosion Cracking?
    a) Flanges
    b) Nozzles
    c) Reducers
    d) Heat Tracing
    d) Heat Tracing
  94. Which of the following is not a factor in the Caustic Stress Corrosion Cracking:
    a) Caustic Strength
    b) Material
    c) Stress
    d) Temperature
    e) Time
    e) Time
  95. Which of the following is a common way that operations causes Caustic Stress Corrosion Cracking in caustic equipment?
    a) Increasing flow rate
    b) lowering the pH
    c) Overpressure
    d) Steam cleaning
    d) Steam cleaning
  96. The likelihood of Caustic Stress Corrosion Cracking can be reduced by:
    a) increasing the operations temperature
    b) reducing the fluid velocity
    c) stress-relieving
    d) using low-hydrogen electrodes
    c) stress-relieving
  97. A carbon steel caustic system has a 10% concentration of NaOH (caustic).  Above what temperature is stress-relieving recommended? (open book)
    a) 140F
    b) 176F
    c) 220F
    d) Carbon steel is not recommended for this % of caustic
    b) 176F
  98. A carbon steel caustic system has a 30% concentration of NaOH (caustic).  Above what temperature is stress-relieving recommended? (open book)
    a) 62F
    b) 140F
    c) 220F
    d) Carbon steel is not recommended for this % of caustic
    b) 140F
  99. A carbon steel caustic system has a 10% concentration of NaOH (caustic). Above what temperature are nickel alloys recommended? (open book)
    a) 60F
    b) 97F
    c) 138F
    d) 205F
    d) 205F
  100. A carbon steel caustic system has a 30% concentration of NaOH (caustic). Above what temperature are nickel alloys recommended? (open book)
    a) 60F
    b) 106F
    c) 176F
    d) 220F
    d) 220F
  101. Sour Water Corrosion primarily affects:
    a) carbon steel
    b) low chromes
    c) carbon steel and low chromes
    d) stainless steel
    a) carbon steel
  102. Which of the following process is not a critical factor contributing to Sour Water Corrosion?
    a) pH
    b) Temperature
    c) Pressure
    d) H2S Concentration
    c) Pressure
  103. Which of the following process chemicals is a critical factor contributing to Sour Water Corrosion?
    a) Carbon
    b) Hydrogen
    c) Oxygen
    d) Sulfur
    e) Vanadium
    c) Oxygen
  104. At which pH does a thin iron sulfide layer deposit on the steel and provides some protection to corrosion?
    a) > 4.5 pH
    b) < 4.5 pH
    c) > 7.0 pH
    d) < 7.0 pH
    a) > 4.5 pH
  105. Which process areas are most susceptible to Sour Water Corrosion?
    a) Boilers
    b) Desalters
    c) Hydrotreater Reactors
    d) Overhead Systems
    e) Vacuum Flashers
    d) Overhead Systems
  106. Sour Water Corrosion typically appears as:
    a) a change in mechanical properties
    b) a crack
    c) general wall loss
    d) localized thinned areas
    e) a pit
    c) general wall loss
  107. Sour Water Corrosion can cause localize corrosion if:
    a) nickel content is steel exceeds 30%
    b) oxygen is present
    c) pH is less than 24
    d) temperature exceeds 400F
    e) velocity is less than 2 fps
    b) oxygen is present
  108. Which materials are generally not susceptible to Acid Sour Water Corrosion?
    a) Chromes
    b) Copper Alloys
    c) Nickel Alloys
    d) Copper and Nickel Alloys
    e) Chrome Nickel Alloys
    d) Copper and Nickel Alloys
  109. Sulfuric Acid causes:
    a) general wall loss
    b) localized wall loss
    c) isolated pitting
    d) both general and localized wall loss
    e) both pitting and localized wall loss
    d) both general and localized wall loss
  110. Which of the following material is the most resistant to Sulfuric Acid Corrosion?
    a) Alloy 20
    b) Alloy C276
    c) High nickel cast iron
    d) 316L SS
    b) Alloy C276
  111. In carbon steel equipment, corrosion rates from sulfuric Acid Corrosion begin to increase significantly if the flow velocities exceed:
    a) 1-2 fps
    b) 2-3 fps
    c) 5 fps
    d) 10 fps
    e) 25 fps
    b) 2-3 fps
  112. In carbon steel equipment, corrosion rates from sulfuric Acid Corrosion begin to increase significantly if the flow velocities exceed:
    a) exceeds 10%
    b) exceeds 30%
    c) exceeds 65%
    d) drops to less than 10%
    e) drops to less than 30%
    f) drops to less than 65%
    f) drops to less than 65%
  113. In carbon Steel equipment, Sulfuric Acid Corrosion can rapidly corrode:
    a) castings
    b) elbows
    c) heat affected zones
    d) welds
    c) heat affected zones
  114. What is the expected corrosion rate for carbon steel that has an operating temperature of 125F and a Sulfuric Acid concentration of 80%?
    a) 5 mpy
    b) 20 mpy
    c) 20-50 mpy
    d) 50 mpy
    e) 50-200 mpy
    d) 50 mpy
  115. What is the expected corrosion rate for carbon steel that has an operating temperature of 75F and a Sulfuric Acid concentration of 60%? (open book)
    a) 20-50 mpy
    b) 50 mpy
    c) 120 mpy
    d) 200 mpy
    c) 120 mpy
  116. What is the expected corrosion rate for carbon steel that has an operating temperature of 175F and a Sulfuric Acid Concentration of 65%? (open book)
    a) 20-50 mpy
    b) 50 mpy
    c) 120 mpy
    d) 200 mpy
    d) 200 mpy

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