NivaarExam PrepOfficial exam papers ↗

22-Agric-A6 Physical Properties of Biological Materials and Food Products: May 2015

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

  1. Question 1 Equipment Selection for Gentle Handling of Shear-Sensitive Fluids
  2. Question 2 Structured Fluids and Colloid Concentration Effects on Rheology
  3. Question 3 Batch-Scale Determination of Process Pressure and Gelation Time
  4. Question 4 Temperature and Texture Control in Packaged Product Distribution
  5. Question 5 Freezing vs. Thawing Rate Asymmetry; Shape Effects on Heating Rate
  6. Question 6 Measuring the Surface Heat Transfer Coefficient of an Irregular Object (Mushroom)
  7. Question 7 Particle Size Distribution — Spray-Dried Milk Droplets and Powder Screen Analysis
  8. Question 8 Optical and Dielectric Property Measurement of Agricultural Materials
  9. Question 9 Stress Relaxation Analysis by the Successive-Residual Method (3-Term Maxwell Model)

Start with Question 1 →

Paper format. 04-Agric-A6 Physical Properties of Biological Materials and Food Products, National Exams May 2015 — a three-hour closed-book exam (approved calculator permitted; one aid sheet, both sides). Nine questions are set and candidates answer any five, each worth 20 marks, for a 100-mark paper. All nine are worked here so the set is a complete study resource.

Reference texts. M.A. Rao, S.S.H. Rizvi, A.K. Datta and J. Ahmed, Engineering Properties of Foods, 4th ed. (rheology of fluid and semisolid foods, particle size, optical and dielectric properties); N.N. Mohsenin, Physical Properties of Plant and Animal Materials, 2nd ed. (thermal and rheological properties of biological materials, surface heat transfer coefficient measurement, stress relaxation); R.P. Singh and D.R. Heldman, Introduction to Food Engineering, 5th ed. (freezing/thawing rates and shape factors, unsteady-state heat transfer, screen analysis); J.F. Steffe, Rheological Methods in Food Process Engineering, 2nd ed. (viscoelasticity, generalized Maxwell model, time-dependent flow behaviour); R.L. Earle, Unit Operations in Food Processing, 2nd ed. (specific surface and particle number from sieve/screen data).