Chemical Process Calculation Questions and Ans

Question 1
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 2
Marks : +2 | -2
Pass Ratio : 100%
Leonard set up the experiment shown below.
Both A and B
Neither A nor B
Only A
Only B
Explanation:
Boiling of water forms steam and due to heat loss condensation is occurring.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
If the fraction of water vapour at 127 Degree Celsius and 1 atm is 0.5, what is the fraction of water vapour at 27 Degree C and 1 atm?
0.275
0.375
0.475
0.875
Explanation:
Fraction = 0.5*300/400 = 0.375.
Question 4
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 5
Marks : +2 | -2
Pass Ratio : 100%
Water changes into water vapour only when boiling occurs. The statement is
Correct
Incorrect
Always correct
None of the mentioned
Explanation:
In other operation as well water result in vapour.
Question 6
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Pass Ratio : 100%
The fraction of water vapor at 300 K and 8 atm is 0.8. Calculate the fraction of water vapor at the same temperature and 1 atm pressure?
0.1
0.2
0.3
0.4
Explanation:
Fraction of water vapor at 300 K and 1 atm pressure is 0.8/8 = 1.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
When vapour is compressed isothermally the ____________ changes.
Volume
Pressure
Temperature
None of the mentioned
Explanation:
When vapour is compressed isothermally the volume changes.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
In a condensation process, _______ to _________
Gas, Solid
Gas, Liquid
Liquid, Gas
Liquid, Solid
Explanation:
In a condensation process, Gas to Liquid.
Question 9
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 10
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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.