Chemical Process Calculation Questions and Ans

Question 1
Marks : +2 | -2
Pass Ratio : 100%
When the vapour is condensed at constant system pressure, the pressure changes.
Correct statement
Incorrect statement
Can`t say anything
None of the mentioned
Explanation:
When the vapour is condensed at constant system pressure, the pressure changes.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
What is the fraction of water vapor at 300 K and 1 atm, if the fraction of water vapor at the same pressure is 0.8 and temperature is 400 K?
0.2
0.4
0.6
0.8
Explanation:
Fraction of water vapor at 127oC and 1 atm = 0.8*300/400 = 0.6.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Condensation starts ________ point.
Dew point
Bubble point
Triple point
None of the mentioned
Explanation:
Condensation starts Dew point.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
________ is the change of vapour in a non-condensable gas.
Saturation
Vaporization
Condensation
None of the mentioned
Explanation:
Condensation is the change of vapour in a non-condensable gas.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Vaporization starts at __________ point.
Dew point
Bubble point
Triple point
None of the mentioned
Explanation:
At Bubble point liquid starts evaporating which is the point at which vaporization starts.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
When the air temperature rises the saturation mixing ratio
Increases
Decreases
Remains same
None of the mentioned
Explanation:
When the air temperature rises the saturation mixing ratio increases.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
In a vaporization process __________ changes to _________
Vapor, liquid
Vapor, solid
Solid, Vapor
Liquid, Vapor
Explanation:
In vaporization process liquid changes to vapor.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
When gas changes to liquid through the process of condensation, the temperature
Increases
Decreases
Remains constant
None of the mentioned
Explanation:
Temperature is constant during condensation.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Amount of water vapor in the air increases as the dew point temperature ______________
Increases
Decreases
Remains same
None of the mentioned
Explanation:
Amount of water vapor in the air increases as the dew point temperature increases.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Heating a liquid at constant pressure can definitely cause____________
Vaporization
Condensation
Boiling
None of the mentioned
Explanation:
Heating a liquid at constant pressure can definitely cause Vaporization.