Question 31 : The humidity at dry-bulb temperature of 20^oC is 10% and the humidity at dry-bulb temperature of 23^oC is 4%, what is the slope of adiabatic cooling line?
1. -0.01
2. -0.02
3. -0.03
4. -0.05
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Question 32 : The humidity at dry-bulb temperature of 20^oC is 30% and the humidity at dry-bulb temperature of 22^oC is 24%, what is the slope of adiabatic cooling line?
1. -0.01
2. -0.02
3. -0.03
4. -0.05
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Question 33 : The humidity at dry-bulb temperature of 23^oC is 30% and the humidity at dry-bulb temperature of 28^oC is 25%, what is the slope of adiabatic cooling line?
1. -0.01
2. -0.02
3. -0.03
4. -0.05
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Question 34 : The humidity at dry-bulb temperature of 20^oC is 40% and the humidity at dry-bulb temperature of 25^oC is 25%, what is the slope of adiabatic cooling line?
1. 0.03
2. -0.03
3. 0.05
4. -0.05
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Question 35 : Enthalpy of air is 20 J and enthalpy of water vapor is 6 J, if the total enthalpy of the system is 23 J, what is the humidity of the system?
1. 10%
2. 20%
3. 40%
4. 50%
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Question 36 : Enthalpy of air is 15 J and enthalpy of water vapor is 20 J, if the total enthalpy of the system is 25 J, what is the humidity of the system?
1. 10%
2. 50%
3. 100%
4. 200%
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Question 37 : Enthalpy of air is 10 J and enthalpy of water vapor is 15 J, if the total enthalpy of the system is 25 J, what is the humidity of the system?
1. 20%
2. 50%
3. 100%
4. 180%
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Question 38 : Enthalpy of air is 5 J and enthalpy of water vapor is 10 J, if the total enthalpy of the system is 25 J, what is the humidity of the system?
1. 50%
2. 100%
3. 150%
4. 200%
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Question 39 : Enthalpy of air is 15 J and enthalpy of water vapor is 20 J, if the total enthalpy of the system is 20 J, what is the humidity of the system?
1. 25%
2. 50%
3. 75%
4. 100%
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Question 40 : In air conditioning process, what has to be done first to the moist air?
1. Heating
2. Cooling
3. Heating & Cooling
4. None of mentioned
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