Question 1 : A process is carried out for the feed mixture of 40% air and 60% oxygen, the compressor recovered 2% of oxygen, what is the exit pressure of the compressor, if the partial pressure of oxygen vapor is 5 mm Hg?
1. 2.4 mm Hg
2. 4.8 mm Hg
3. 6.5 mm Hg
4. 8.4 mm Hg
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Question 2 : A process is carried out for the feed mixture of 50% air and 50% methane vapor, the compressor recovered 20% of methane, what is the exit pressure of the compressor, if the partial pressure of methane vapor is 25 mm Hg?
1. 56.3 mm Hg
2. 78.9 mm Hg
3. 92.1 mm Hg
4. 98.7 mm Hg
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Question 3 : A process is carried out for the feed mixture of 80% air and 20% CO₂, the compressor recovered 50% of CO₂, what is the exit pressure of the compressor, if the partial pressure of CO₂ is 15 mm Hg?
1. 135 mm Hg
2. 145 mm Hg
3. 175 mm Hg
4. 200 mm Hg
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Question 4 : A process is carried out for the feed mixture of 95% air and 5% ammonia vapor, the compressor recovered 40% of ammonia, what is the exit pressure of the compressor, if the partial pressure of ammonia vapor is 10 mm Hg?
1. 225.4 mm Hg
2. 326.8 mm Hg
3. 451.2 mm Hg
4. 593.5 mm Hg
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Question 5 : A process is carried out for the feed mixture of 90% air and 10% water vapor, the compressor recovered 90% of water, what is the exit pressure of the compressor if the partial pressure of water vapor is 50 mm Hg?
1. 286.1 mm Hg
2. 396.4 mm Hg
3. 458.7 mm Hg
4. 529.5 mm Hg
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Question 6 : What is the fraction of water vapor at 27^oC and 1 atm, if the fraction of water vapor at 127^oC and 1 atm is 0.8?
1. 0.2
2. 0.4
3. 0.6
4. 0.8
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Question 7 : If the fraction of water vapor at 27^oC and 5 atm is 0.5, then what is the fraction of water vapor at 27^oC and 1 atm?
1. 0.1
2. 0.2
3. 0.5
4. 0.8
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Question 8 : Condensation starts at which point?
1. Dew point
2. Bubble point
3. Triple point
4. None of the mentioned
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Question 9 : Which of the following is not a way of condensation of vapor?
1. Cooling at constant volume
2. Cooling at constant pressure
3. Compress it isothermally
4. Compress it
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Question 10 : Which of the following defines condensation?
1. Change of solid to vapor
2. Change of vapor to liquid
3. Change of liquid to vapor
4. Change of vapor to solid
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