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23-Chem-B6 Petroleum Refining and Petrochemicals: Undated paper

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Petroleum-refining terminology and API blending
  2. Question 2 Refinery process units — hydrocracking, alkylation, reflux–stages, desalting
  3. Question 3 Octane number and octane-improving processes
  4. Question 4 Thermal (TC) and catalytic (FCC) cracking — process comparison
  5. Question 5 Two-column distillation-sequence material balance

Start with Question 1 →

National Exam 16-Chem-B6, Petroleum Refining and Petrochemicals — May 2019. 3 hours, OPEN BOOK exam (any non-communicating calculator permitted). Per the exam notes, FIVE (5) questions constitute a complete paper and only the first five as they appear in the answer book are marked; the paper as printed contains exactly five questions, all answered in full below. Questions are answered in essay format where required (clarity and organization are explicitly marked); the two calculation parts — Q1(b) blending density and Q5 distillation-sequence mass balance — follow the worked-solution format. All five questions are printed as “10 Marks”, consistent with the page-1 note that each question is of equal value.

The paper heads its last question (page 6) “Question Number IV” a second time; there is no “Question Number V”. The two are distinct questions (page 5 is the TC/FCC black-box comparison, page 6 the two-column distillation balance), so they are numbered 1–5 here in printed order.

Reference texts: Gary, Handwerk & Kaiser, Petroleum Refining: Technology and Economics, 5th ed.; Fahim, Al-Sahhaf & Elkilani, Fundamentals of Petroleum Refining; J. G. Speight, The Chemistry and Technology of Petroleum, 5th ed.; Perry's Chemical Engineers' Handbook, 9th ed. (Sec. 13, Distillation). ASTM test methods cited by number for the property definitions.