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Thermodynamics Practice Test: Psychrometrics
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Avg score: 60% • Most missed: “Which of the following statement is true?”

Psychrometrics topics include: Psychrometric chart and process, atmospheric air properties.

Psychrometrics (as distinct from psychometrics) is the study of the thermodynamic properties of air–vapour mixtures, typically focusing on the interrelation among temperature, partial pressures and enthalpy.

Related Test: Refrigeration and Air Conditioning Practice Test: Psychrometry 

Thermodynamics Practice Test: Psychrometrics
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25 Questions

1. If water is injected into a container with has unsaturated air,
2. At any dbt, the ____ the difference of wbt reading below below dbt, ____ is the amount of water vapour held in mixture.
3. The degree of saturation varies between -1 and 0.
4. Air can be cooled and dehumidified by
5. Heating and humidification is done in
6. Dry air consists of
7. Complete dry air exists in nature.
8. In adiabatic evaporative cooling, heat transfer between chamber and surroundings is ____
9. In sensible heating or cooling,
10. Which of the following statement is true?
11. Cooling and dehumidification of air is done in summer air conditioning.
12. The cooling tower uses the phenomenon of evaporative cooling to cool warm water above the dbt of air.
13. The wet bulb temperature is the ____ temperature recorded by moistened bulb.
14. Which of the following is true?(here pa=partial pressure of dry air, pw=partial pressure of water vapour, p=atmospheric pressure)
15. Cooling towers are rated in terms of
16. Relative humidity is defined as
17. When air passes through silica gel,
18. Which of the following statement is true?
19. Which of the following is an absorbent?
20. When unsaturated air flows over a sheet of water in an insulated chamber
21. In a mixture of dry air and water vapour,
22. For saturated air, relative humidity is 0%.
23. When humidity ratio of air ____ air is said to be dehumidified.
24. The degree of saturation is the ratio of
25. When pw is very small,

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