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All FSC 432 Quiz Exam Questions And Answers 2025
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All FSC 432 Quiz Exam Questions And Answers 2025
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Terms in this set (100) Q&AAll FSC 432 Quiz/ Exam Questions And
Answers 2025
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 increase the thermodynamic stability of some methylated
dibenzothiophenes.
,Terms in this set (100) Q&A
-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 in some methylated dibenzothiophenes react with hydrogen
reducing the availability of hydrogen for hydrodesulfurization reactions. - -
Methyl groups shield the sulfur atom in some methylated
dibenzothiophenes.
Asphaltenes that are separated from different crude oils by using the same
solvent fractionation scheme may not have have the same molecular
composition. (T/F) - 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 575°F.
Mark all the correct statements in the list below for the best assessment of
the given data.
-This represents an ASTM gap of 10°F.
-This represents an ASTM overlap of 10°F.
-This represents a distillation efficiency of 90%.
-This may indicate maximum use of steam in the distillation column.
-This represents a TBP overlap of 10°F. - This represents an ASTM overlap
of 10°F.
,Terms in this set (100) Q&A
Choose all the expressions below that correctly complete the following
sentence.
Deasphalting process can be considered as a
-hydrogen abstraction process.
-supporting process.
-carbon rejection process.
-finishing process.
-hydrogen addition process.
-separation process. - -carbon rejection process.
-separation process.
Choose one of phrases below that would most correctly complete the
following sentence. Removal of nitrogen (HDN) may be used as a
pretreatment process in a refinery in order to protect ..
-acid catalysts.
-neutral catalysts.
-metal catalysts.
-base catalyts.
-liquid catalysts. - -acid catalysts.
Choose one of the expressions below that would best complete the
following sentence.
If not treated, heavy naphtha from Light Ends Unit could end up in low-
octane number gasoline pool because
, Terms in this set (100) Q&A
-its vapor pressure is low.
-its olefin content is low.
-its n-paraffins and naphthenes content is high.
-its hydroaromatic hydrocarbon content is low.
-its sulfur content is high. - -its n-paraffins and naphthenes content is high.
Choose one of the expressions below that would best complete the
following sentence. Full-range naphtha obtained from the top of the crude
distillation tower is sent to the Light Ends Unit to produce fuel gas, LPG,
light naphtha and heavy naphtha by
-physical adsorption.
-chemisorption.
-boiling point distribution.
-density distribution.
-solubility distribution. - -boiling point distribution.
Choose one of the phrases below that would correctly complete the
following sentence. Hydrotreatment is a...
-separation process.
-supporting process.
-finishing process.
-generation process.
-conversion process. - -finishing process.
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