API 571 PRACTICE QUESTIONS FOR API 570 EXAM

API 571 PRACTICE QUESTIONS FOR API 570 EXAM What does "L" mean in Austentic SS, like 304L? A) Has a low carbon content B) has a low chrome content C) has a low nickel level D) has a low toughness level E) is lousy steel A What does "H" mean in Austenitic SS, like 316 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 E) is horrible steel A 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 Low alloy steel can contain up to: A) 5% chrome B) 9% chrome C) 12% chrome D) 18% chrome E) 30% chrome B Which of the following is an Austenitic SS? A) Type 316 B) type 2205 C) type 405 D) type 410 A Which of the following is a Ferritic SS? A) type 316 B) type 2205 C) Type 405 D) type 410 C Which of the following is a Martensitic SS? A) type 316 B) type 2205 C) type 405 D) TYPE 410 D Nickel alloys are materials that have over : A) 18% nickel B) 25% nickel C) 30% nickel D) 50% nickel C 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 Which of the following materials is LEAST affected by Brittle Fracture? A) carbon steel B) chromes C) 300 series stainless steel D) 400 series stainless steel E) all stainless steel C Which of the following is NOT a critical factor that contributes to a Brittle Fracture? A) the material's fracture toughness B) Maximum operating temperature C) stress concentration at a flaw D) magnitude of the residual stresses B Resistance to Brittle Fracture is called: A) charpy B) embossment C) strength D) Toughness D Which of the following increases the likelihood of Brittle Fracture? A) Larger grain size. B) operational temperatures above 800°F. C) steels lees that ¼ " thick D) the additional of nickel in the material A Which of the following increases the likelihood of Brittle Fracture? A) smaller grain size B) operating above transitional temperature C) Thicker materials D) the additional of nickel in the material C What test is used to determine a material's toughness? A) Charpy impact test 4.2.7.3.e B) guided bend test C) metallography D) tension test E) physical fitness test A 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 ASME Section VIII had few limitations concerning Brittle Fracture prior to: A) 1955 B) 1962 C) 1973 D) 1987 D A 4" thick 5 Chrome vessel operates at 1200 psig and 900°F. 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 Most brittle failures appear as : A) branched cracking B) intergranular cracking C) ductile tears D) Cleveage D 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) controlling minimum operating temperatures A Thermal Fatigue is caused by: A) Cyclic stresses that come from temperature variations. B) long term operation at elevated temperatures C) excessive thermal growth D) hours of physical activity during a hot summer day A Time to failure by Thermal Fatigue is primarily affected by : A) magnitude of stress and operating temperature B) Magnitude of stress and number of cycles C) carbon content in material and operating temperature D) carbon content in material and number of cycles B Thermal Fatigue becomes of concern if temperature swing exceed: A) 50% B) 100% C) 200 °F D) 400 °F C Which of the following is NOT a primary initiating point for Thermal Fatigue? A) notches B) Rounded pits C) nozzle-to-shell welds D) toe of the weld B Which of the following is NOT a prime candidate for Thermal Fatigue? A) coke drums B) steam actuated soot blowers C) mix points of hot and cold streams D) 600 psig steam piping E) welds joining materials having different coefficients of expansion D Thermal Fatigue cracks usually: A) Initiate on the surface of the component. 4.2.9.5.a B) initiate in the subsurface of the component C) grow very rapidly (at the speed of sound in the material) D) are very tight and narrow A Many Thermal Fatigue cracks are filled with: A) chlorides B) hydroslime C) Oxides D) sulfides C Thermal Fatigue cracks: A) propagade rapidly B) initiate with the first thermal cycle C) Propagate transverse to the stress D) propagade parallel to the stress C Which of the following is NOT a way to prevent Thermal Fatigue? A) blend grinding weld caps B) control rates of heating and cooling C) make smooth transitions D) Join materials with differential rates of thermal expansion D The removal of surface material by impacting materials is called: A) Erosion B) erosion-corrosion C) erosion or erosion-corrosion D) IPC ( imparting particle corrosion) A The removal of a material's protective scale by impacting materials is called: A) erosion B) Erosion - Corrosion C) erosion or erosion-corrosion D) IPRSC (imparting particle removal of scale corrosion) B Which of the following is NOT a primary factor contributing to Erosion? A) impact angle (angle that impacting particles strike metal) B) size of impacting particles C) velocity of impacting particles D) density of impacting particles E) Corrosiveness of the environment E Which of the following is NOT a primary factor contributing to Erosion-Corrosion? A) impact angle (angle that impacting particles strike metal) B) Tensile strength of the metal C) velocity of impacting particles D) Corrosiveness of the environment B A prime location for Erosion is : A) In catalyst piping*** B) downstream of a fate valve C) in superheated steam piping A In the Crude Unit, piping and vessels may have high metal loss from Erosion - Corrosion if the unit is exposed to: A) hydrogen B) low strength caustic C) Naphthenic acid*** D) water C Erosion or Erosion-Corrosion usually appears as: A) Directional pits, grooves or waves*** B) directional cracks C) random pitting D) random grooving A A 6 NPS carbon steel line is experiencing Erosion-Corrosion. A reasonable solution would be to : A) overlay the inside of the pipe with Stellite or another hard alloy B) Increase the line size to 10 NPS*** C) remove all elbows and replace with long bent pipe D) reduce the velocity by lowering the Unit throughput by 50% B 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 conditions of bird poop then rain, bird poop then rain, etc. A 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 Fatigue will NOT occur in carbon steel if stresses are below the: a) Transition limit b) Endurance limit 4.2.16.3.b.1 c) Hardening limit d) Speed limit B The endurance limit is usually about: a) 10-20% of a material's ultimate tensile strength b) 40-50% of a material's ultimate tensile strength c) 10-20% of a material's yield strength d) 40-50% of a material's yield strength e) Half-way up the ladder of a 150' column (tower) B Which material does NOT have an endurance limit? a) Non-normalized carbon steel b) Normalized carbon steel c) Stainless steel d) titanium C 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 e) Taco shell appearance A 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 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 crack begins, only a few cycles are needed for the crack to lead to failure d) Often the equipment is vibrating making non-destructive evaluations difficult C Vibration Induced Fatigue affects: a) All materials b) Primarily low chromes c) Primarily chromes d) Primarily 300 series stainless steels A Which of the following is NOT a factor of Vibration Induced Fatigue? a) Inadequate supports b) Excessive stiffners c) Vibration amplitude d) Vibration frequency e) Operating pressure E Vibration will occur in piping when : a) Mechanical equipment is nearby b) The piping system has a natural frequency c) The input frequencies are synchronous with the natural frequency. d) There is a full moon in line with Mars C Which of the following piping is most affected by Vibration Induced Fatigue? a) Large-bore column overhead line b) Large-bore piping operating over 800°F c) Small-bore piping at mechanical equipment. d) Small-bore piping in a piperack e) Operating pressure C Which of the following does NOT prevent a failure by Vibration Induced Fatigue? a) Upgrade materials "alloy up".