Try these 10 mock exam questions from the API 570 BoK. Give yourself 30 minutes (if you look them up in the API 570 Effectivity List codes) or 10 minutes if you attempt them closed-book (not recommended unless you are very familiar with API/ASME codes). There is a single correct answer unless stated otherwise. If there are multiple answers mentioned, you must get exactly the correct answers; if you tick too few or too many answers you get the question wrong, with no credit for any correct answers you did choose. Sorry, that’s the exam rules.
A good mark is 7/10 correct. Choose your answers, then check out the answers here
Qu 1. Which of these will suffer the worst galvanic corrosion when connected to type 316 passive-state stainless steel;
a) Type 304SS (passive static)b) Carbon steelc) Aluminiumd) Copper-Nickel
Qu 2. What is the minimum test pressure of a Class 300 A350 Gr LF6 Cl.2 forged fitting with a design temperature of 200°C?
a) 48.6 barb) 52 barc) 73 bard) 78 bar
Qu 3. For ferrous piping materials not listed in B31.1 Table A-1, allowable stress (S) may be calculated using;
a) SY/3b) 2/3 STc) ST/3d) ST/4
Qu 4. Personnel training requirements for the assembly of flanged pipe joints are set out in;
a) ASME PCC-1b) ASME PCC-2c) ASME B16.5d) ASNT-TC-1A and CP 189
Qu 5. When may the preheat-only method not be used as an alternative to PWHT? There maybe one or more correct answers.
a) The material is P-3 (Gr 1 or 2)b) The preheat used < 300°Cc) Impact testing is requiredd) The PWHT is for environmentally-influenced cracking (EIC) considerations
Qu 6. A buried piping system has a design pressure of 200psi and a maximum operatingpressure of 150psi. It is buried in a soil of resistivity 8000 ohm-cm and not protectedby a CP system. If it is decided to perform leak-testing in lieu of inspection, it should beleak-tested;
a) At 210psi every 5 yearsb) At 300psi every 10 yearsc) At 165psi every 10 yearsd) At 165psi every 5 years
Qu 7. For unknown piping materials, MAWP calculations may be made assuming;
a) Average-grade material strengths in the applicable codeb) Lowest-grade material strengths in the applicable codec) Allowable stress is 17.5ksid) The material is A283 Grade C
Qu 8. After short-term and long-term corrosion rates have been compared, who selects the corrosion rate that best reflects the current process conditions?
a) The inspectorb) The inspector or owner-userc) The inspector and owner-userd) The inspector and corrosion specialist
Qu 9. Which of these parameters are not included in ‘pressure design thickness’? There may be one or more correct answers.
a) Corrosion allowanceb) Reinforcement thicknessc) Mill tolerancesd) Structural loads
Qu 10. Corrosion rates at CMLs shall be calculated using, as a minimum;
a) 15 readings, including the thinnest measuredb) The three thinnest readings measured around each recording pointc) The thinnest or an average reading at each recording pointd) Three readings in a 2in (50mm) diameter circle at each recording point
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