GATE AG 2025 • Q19 MCQ • 1 Mark

Section 7: Dairy and Food Engineering

Preservation of Food

Subtopic: Refrigeration and cold storage basics and applications

Question Statement:

The condition of refrigerant at the exit of the compressor in a vapor compression refrigeration system is:

Options:

  • (A) Saturated liquid
  • (B) Wet vapor
  • (C) Dry saturated vapor
  • (D) Superheated vapor

Official Answer Key:

D

Step-by-Step Solution & Explanation

The compressor takes in (nominally) dry saturated vapor and isentropically compresses it to a higher pressure; this raises its temperature above the corresponding saturation temperature, so the refrigerant leaves the compressor as superheated vapor.

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