NivaarExam PrepOfficial exam papers ↗

04-BS-10: December 2018

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

  1. Question 1 Regenerative Rankine Cycle, Closed + Open Feedwater Heaters
  2. Question 2 Cold-Air-Standard Regenerative Brayton Cycle
  3. Question 3 Two-Evaporator R-134a Refrigeration System
  4. Question 4 N₂/O₂ Mixture — Adiabatic Compression
  5. Question 5 Adiabatic Compression of Moist Air
  6. Question 6 Rigid Insulated Tank with Paddle Wheel
  7. Question 7 Two-Phase Water Expansion, Pv = Constant
  8. Question 8 Air Turbine — Power and Exit Area
  9. Question 9 Carnot Power Cycle — Air Standard

Start with Question 1 →

National Exam 04-BS-10, Thermodynamics — December 2018. 3 hours, Closed-Book Exam (approved calculator and one double-sided 8.5x11-inch aid sheet permitted; property tables and charts supplied in an appendix, interpolation not required — the closest tabular value may be used). Part A: answer 2 of Questions 1–3 (20 marks each). Part B: answer 4 of Questions 4–9 (15 marks each), for a 100-mark paper. Only the first two Part-A and first four Part-B questions as they appear in the answer book are marked. All nine questions (Part A complete, Part B complete) are solved below for completeness.

Reference texts: Cengel & Boles, Thermodynamics: An Engineering Approach, 8th ed.; Moran, Shapiro, Boettner & Bailey, Fundamentals of Engineering Thermodynamics, 8th ed. All state properties (water/steam, R-134a, air, N₂, O₂, humid air) were computed from high-accuracy equations of state in place of printed property-table interpolation; every boxed numeric result.