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FSC 432 Final Exam Questions And Answers 2025
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FSC 432 Final Exam Questions And Answers 2025
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Terms in this set (100) Q&AFSC 432 Final Exam Questions And
Answers 2025
"Compared to the vacuum distillation of paraffinic crude oils, lower
temperatures need to be used during the vacuum distillation of aromatic
crude oils to prevent possible coking in the distillation column"
-True
-False - false
A preliminary calculation to assess the operation of a depropanizer column
shows that 8 theoretical plates would be needed for the desired level of
separation in the column. Mark the correct statement below assuming a
plate efficiency of 80% and a reflux correction factor of 2.
,Terms in this set (100) Q&A
-The column would need 20 actual plates
-The column would need 13 actual plates
-The column would need 24 actual plates
-The column would need 16 actual plates
-The column would need 28 actual plates - The column would need 20
actual plates
A wet flue gas analysis in vol% from an FCC regenerator is as follows: N2:
81%, CO2:12%, CO:2%, O2:1%, and H2O: 4%. What is the hydrogen
content (as wt%) of the coke burnt) in the regenerator? Assume that the
coke burnt in the regenerator consists only of carbon and hydrogen and dry
air is used to burn the coke. Mark the choice below that is closest to the
correct answer.
Hydrogen content of the coke burnt is 5.0 wt%.
Hydrogen content of the coke burnt is 3.0 wt%.
Hydrogen content of the coke burnt is 4.0 wt%.
Hydrogen content of the coke burnt is 4.5 wt%.
Hydrogen content of the coke burnt is 5.5 wt%
Hydrogen content of the coke burnt is 3.5 wt%. - Hydrogen content of the
coke burnt is 3.0 wt%.
Among the sulfur species in petroleum fractions some of the methylated
dibenzothiopenes are the most resistant compounds to
hydrodesulfurization. Choose one of the statements below that best
explains why some methylated dibenzothiophenes are resistant to
hydrodefulfurization? - Methyl groups shield the sulfur atom in some
methylated dibenzothiophenes
,Terms in this set (100) Q&A
Among the sulfur species in petroleum fractions some of the methylated
dibenzothiopenes are the most resistant compounds to
hydrodesulfurization. Choose one of the statements below that best
explains why some methylated dibenzothiophenes are resistant to
hydrodesulfurization.
Methyl groups shield the sulfur atom in some methylated
dibenzothiophenes.
Methyl groups in some methylated dibenzothiophenes react with hydrogen
reducing the availability of hydrogen for hydrodesulfurization reactions.
Methyl groups in some methylated dibenzothiphenes react with
molybdenum found in the hydrodesulfurization catalyst.
Methyl groups introduce non-planarity to some methylated
dibenzothiophenes.
Methyl groups increase the thermodynamic stability of some methylated
dibenzothiophenes. - Methyl groups shield the sulfur atom in some
methylated dibenzothiophenes.
As a physical separation process, crude distillation does not consume as
much thermal energy as conversion processes that involve breaking
chemical bonds in the hydrocarbons that constitute the feedstocks.
True
False - False
Asphaltenes that are separated from different crude oils by using the same
solvent fractionation may not have have the same molecular composition.
True
, Terms in this set (100) Q&A
False - True
ASTM distillation temperature of a light gas oil sample at 95% vol distilled is
585°F, whereas the ASTM temperature of a heavy gas oil sample at 5% vol
distilled is 590°F. Mark the correct statement below for the best
assessment of the given data.
This represents an ASTM gap of 0°F.
This represents an ASTM gap of 5°F.
This represents a distillation efficiency of 85%.
This represents an ASTM overlap of -5°F.
This indicates maximum steam use in the column. - This represents an
ASTM gap of 5°F.
At least two drums are used in the delayed coking process in order to...
-ensure the continuity of VDR flow
-increase the coke quality
-fractionate the coking products
-delay the coking reactions
-increase the coke yield - ensure the continuity of VDR flow
Can one use diesel fuel in engines made for burning gasoline? - No! Using
diesel fuel in a spark-ignition (gasoline) engine would destroy the engine.
Carbenium ions are made by...
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