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GATE 2025 AG – Question 42

Dairy and Food Engineering · Unit Operations in Dairy and Food Engineering · 2 marks · Multiple select

Match 1 Sensible cooling,2 Cooling and dehumidification,3 Chemical dehumidification,4 Heating and humidification with P Dry-bulb increases/dew-point decreases, Q Both increase, R Dry-bulb decreases/dew-point constant, S Both decrease. Select all correct mappings.

  1. 1–R,2–S,3–Q,4–P
  2. 1–P,2–R,3–S,4–Q
  3. 1–R,2–S,3–P,4–Q
  4. 1–P,2–Q,3–S,4–R

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Show answer and explanation

Correct answer: (C) 1–R,2–S,3–P,4–Q

Explanation

Sensible cooling changes temperature at constant humidity ratio, so dew point is unchanged:1–R. Cooling with moisture removal lowers both temperatures:2–S. Desiccant dehumidification removes vapor and releases heat:3–P. Heating with humidification increases both:4–Q. Only **C** lists all four correctly.

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