Question Bank • QB_SUB_APE_0006 MCQ • 1 Mark

Section 6: Agricultural Process Engineering

Evaporation and Drying

Subtopic: Psychrometry – properties of air-water vapour mixture

Question Statement:

On a standard carrier psychrometric chart, a sensible heating process without moisture addition or removal follows a:

Options:

  • (A) Horizontal line from left to right at constant humidity ratio ($W = \text{constant}$)
  • (B) Vertical line along constant dry-bulb temperature
  • (C) Line along constant enthalpy
  • (D) Saturation curve line

Answer Key:

A

Step-by-Step Solution & Explanation

Sensible heating increases dry-bulb temperature while specific humidity remains strictly constant, producing a horizontal line moving rightward on the psychrometric chart.
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