Q. When does a vapour become superheated?

  • (A) when the temperature of vapour is less than the saturation temperature at given pressure
  • (B) when the temperature of vapour is more than the saturation temperature at given pressure
  • (C) when the temperature of vapour is equal to the saturation temperature at given pressure
  • (D) none of the mentioned
πŸ’¬ Discuss
βœ… Correct Answer: (B) when the temperature of vapour is more than the saturation temperature at given pressure

Q. The properties of liquid with pressure.

  • (A) do not vary
  • (B) vary largely
  • (C) vary little
  • (D) none of the mentioned
πŸ’¬ Discuss
βœ… Correct Answer: (C) vary little

Q. What is the effect of reheat pressure on mean temperature of heat addition Tml?

  • (A) reheat pressure is directly proportional to tml
  • (B) reheat pressure is inversely proportional to tml
  • (C) reheat pressure is equal to tml
  • (D) tml is independent of reheat pressure
πŸ’¬ Discuss
βœ… Correct Answer: (A) reheat pressure is directly proportional to tml

Q. The degree of saturation is the ratio of

  • (A) (saturated specific humidity / actual specific humidity)^2
  • (B) 1/(saturated specific humidity * actual specific humidity)
  • (C) saturated specific humidity / actual specific humidity
  • (D) actual specific humidity / saturated specific humidity
πŸ’¬ Discuss
βœ… Correct Answer: (D) actual specific humidity / saturated specific humidity

Q. At any dbt, the the difference of wbt reading below below dbt, is the amount of water vapour held in mixture.

  • (A) smaller, smaller
  • (B) greater, greater
  • (C) greater, smaller
  • (D) smaller, greater
πŸ’¬ Discuss
βœ… Correct Answer: (C) greater, smaller

Q. When unsaturated air flows over a sheet of water in an insulated chamber

  • (A) specific humidity of air decreases
  • (B) the water evaporates
  • (C) both air and water are cooled during evaporation
  • (D) all of the mentioned
πŸ’¬ Discuss
βœ… Correct Answer: (A) specific humidity of air decreases

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