Engineering Thermodynamics Set 21

Mechanical Engineering

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This set of Engineering Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on Engineering Thermodynamics Set 21

Q1 | When humidity ratio of air          air is said to be dehumidified.
  • increases
  • decreases
  • remains constant
  • none of the mentioned
Answer: decreases
Q2 | The degree of saturation is the ratio of
  • (saturated specific humidity / actual specific humidity)^2
  • 1/(saturated specific humidity * actual specific humidity)
  • saturated specific humidity / actual specific humidity
  • actual specific humidity / saturated specific humidity
Answer: actual specific humidity / saturated specific humidity
Q3 | At any dbt, the          the difference of wbt reading below below dbt,          is the amount of water vapour held in mixture.
  • smaller, smaller
  • greater, greater
  • greater, smaller
  • smaller, greater
Answer: greater, smaller
Q4 | When unsaturated air flows over a sheet of water in an insulated chamber
  • specific humidity of air decreases
  • the water evaporates
  • both air and water are cooled during evaporation
  • all of the mentioned
Answer: specific humidity of air decreases
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