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22-Mec-A6 Fluid Machinery: May 2014

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

  1. Question 1 Pump Power and Homologous Scaling
  2. Question 2 Hydro Turbines — Pelton Wheel and Francis Setting
  3. Question 3 Steam Turbine Impulse Blades
  4. Question 4 Compressor First Stage
  5. Question 5 Boiler Draught Fans in Parallel
  6. Question 6 Turbine Efficiency versus Load
  7. Question 7 Fan Flow-Control Methods
  8. Question 8 Number of Stages — Compressor versus Turbine

Start with Question 1 →

Paper format. National Examination 07-Mec-A6-1 Fluid Machinery (May 2014) — closed book, three hours, 60 marks. Section A is calculative (Q1–Q5) and Section B is descriptive (Q6–Q8); the rubric asks for four of Section A plus two of Section B (six questions, each of equal value, 10 marks). All eight questions are solved in full as a study resource. General constants supplied with the paper: g = 9.81 m/s², patm = 100 kPa, pvapour = 2.34 kPa (20 °C), ρwater = 1000 kg/m³, ρair = 1.21 kg/m³ (15 °C), cp,air = 1.005, cv,air = 0.718 kJ/kg·K.

Reference texts. S. L. Dixon & C. A. Hall, Fluid Mechanics and Thermodynamics of Turbomachinery (7th ed.); R. K. Turton, Principles of Turbomachinery; H. Cohen, G. F. C. Rogers & H. I. H. Saravanamuttoo, Gas Turbine Theory (for the axial compressor stage); R. W. Fox, A. T. McDonald & P. J. Pritchard, Introduction to Fluid Mechanics (pump energy equation and affinity laws).