NivaarExam Prep

22-Agric-B8 Food Process Engineering (Part 1)

Worked solutions to 3 past sittings (2013–2017), 30 questions. Pick a sitting, or start from a topic below.

Topics across the sittings

Topics that come up in more than one sitting, taken from the headings of our worked solutions. A topic counts once per sitting.

Questions by sitting

May 2017

  1. Question 1: Chilling honeydew melons before shipping
  2. Question 2: Steam-pipe heat loss and the payback of adding insulation
  3. Question 3: Sizing a counter-current double-pipe heat exchanger
  4. Question 4: Air-blast freezing time of a partially frozen ice-cream brick
  5. Question 5: Scaling freezing time with product size, air velocity, and medium temperature
  6. Question 6: F-value for a target spoilage rate, and the Ball formula process time
  7. Question 7: F-value by the graphical (General) method
  8. Question 8: Forward-feed double-effect evaporator — required steam pressure
  9. Question 9: Steam economy of a double-effect evaporator with two feed preheaters
  10. Question 10: Single-effect evaporator — rating at two different feed rates

May 2014

  1. Question 1: Retort Come-Up Estimate — Pudding Can Heat Penetration
  2. Question 2: Transient vs. Steady-State Heat Transfer in Food Processing
  3. Question 3: Grapefruit Freezing Time — Modified Plank (Levy)
  4. Question 4: Sweet Cherry Freezing Time — Cleland-Earle Method
  5. Question 5: Ball Process Time, Come-Up Correction and General-Method \(F_0\)
  6. Question 6: Heat-Penetration Curve — \(f_h\), \(j_h\) and Process Time at 260°F
  7. Question 7: Aseptic Holding-Tube Length and Spoilage Probability
  8. Question 8: Double-Effect Evaporator, Reverse Feed — Solids Leaving the Second Effect
  9. Question 9: Double-Effect Evaporator, Forward Feed — Solids Leaving the First Effect
  10. Question 10: Peach Puree Evaporator and Condenser — Flow Rates and Duties

December 2013

  1. Question 1: Aseptic Holding-Tube Spoilage Probability
  2. Question 2: Process Deviation — Stumbo g-Table Procedure
  3. Question 3: 5D Process Time and Spoilage Under a Mis-Stated z-Value
  4. Question 4: Plate Evaporator — Milk Concentration and Fouling
  5. Question 5: Vapour Recompression and Steam-Jet Ejection
  6. Question 6: Forward-Feed Double-Effect Evaporator — Steam Economy
  7. Question 7: Freezing Time in Liquid Nitrogen — Surface Heat Transfer Coefficient
  8. Question 8: Can Freezing — Convective Heat Transfer Coefficient
  9. Question 9: Can Heating in a Retort — Centre Temperature by Heisler Charts
  10. Question 10: Walk-In Freezer — Composite Wall Heat Transfer